Brac test in late 60's...

If you have the gene, you have the gene, whether or not you take the test.   Finding out just helps your daughter - instead of leaving her in blissful ignorance that could hurt her down the line.    Hopefully you will come back negative, but if not, that doesn't automatically mean she will be positive - there's still a 50-50 chance she won't be, unless her father also carries it.    If you do come back positive, what that means for her is that she should be tested .... nothing more until those results are in.   If she is positive, better she knows so she can make appropriate decisions about screening and risk reductions instead of being blindsided by an unexpected diagnosis.  

(((HUGS))) I took the test myself in large part for my two daughters (ages 13 and 10).  Fortunately I was negative, but my way of thinking about it for them was simply that knowledge is power.

Hindsfeet, with the fact that you've had two separate breast cancers and two recurrences, I suspect your daughter is already dealing with the fear that she will get breast cancer.  Even if she doesn't say anything to you about it.  

So you shouldn't regret that you've had the test.  You should be proud of yourself for having test.  You are doing something proactive that will hopefully ease your daughter's mind, or possibly could save her life.  If you test positive for a BRCA mutation - which is quite possible but which is what you hope doesn't happen - that provides hugely important health information for your daughter.  At that point, your daughter can choose to be tested.  As Annette and lintrollerderby indicated, your being BRCA positive doesn't mean that your daughter will be - there is a 50% chance that she will test negative.  And if she tests negative, think about how relieved she will be and how much that will ease her mind! On the other hand, if she tests positive, she will be in a position to make decisions about what to do to manage and/or reduce her risk, whether it's joining a high risk program and getting increased screening, whether it's taking a drug like Tamoxifen, or whether it's surgery.  

The fact is that you either are BRCA positive or you're not.  And your daughter is either BRCA positive or she's not.  Your being testing doesn't change that for either of you.  The only thing being tested changes is whether you know if you are BRCA positive or not.  If you do test positive, of course when your daughter finds out, she
will be scared both for you and for herself. And if she subsequently finds out
that she too is BRCA positive - and therefore very high risk to develop breast cancer - she will no doubt be very upset. But it's not the test that puts your daughter at risk.  Quite the opposite.  The risk is already there. The test simply exposes the risk and allows your daughter to do something about it.  If it turns out that you are BRCA positive, your being tested provides you, and your daughter, with the information necessary to be able to take charge of your health and make proactive decisions. And that's a good thing.

I agree with the others, the test only changes knowledge...and the ability to do something about it. It does not change whether you have the gene or not. Your daughter likely already is aware there is a "risk" to her...and even if you are negative for BRCA-mutations she may still be at risk (she should talk to a genetic counselor, in any event). Unfortunately a negative result in your case may not mean she is in the clear. If you are positive she may still be negative...a true negative...which would be wonderful news! If you and she are positive, there are added screening options, preventative options (surgery, chemoprevention, etc) and great medical care teams out there for high risk women.  A BRCA-mutation puts one at risk of other cancers too, so even if you have had BC, it still allows higher care for other areas of concern.

As was indicated, while early onset is one marker of a potential BRCA-mutation, it is not the only one. A high family history of BC, ovarian, pancreatic, etc, bilateral BC, ovarian and BC in same person, are all potential flags as well.

I think it is a good idea to have taken the test, it will help clarify some things for you and your daughter, but whether your test comes back negative or positive, your daughter should talk to a genetic counselor as either result can have different implications and options for her.

Big hugs!  It can be tough waiting.  

I'm speaking from the perspective of a grown child who has not yet gotten cancer.  I think testing is a wonderful thing you can do for your daughter as well as for yourself.  As everyone has already said, if you and her have the mutation, it's there regardless of whether you test or not, but if you test, there are things you and she can do to help significantly reduce your future risks!