Tamoxifen and Severe Headaches

I was diagnosed on Valentine's Day 2017 with IDC Stage 1C and had a lumpectomy to remove the tumor.  I then started TC chemo and had a severe allergic reaction to the Taxotere on the 3rd treatment after 9 days.  I thought I was having a Heart Attack in which turned out to be anaphylactic shock to my system.  It started with my head being covered in hives and only got worse from there.  After a trip to the ER via ambulance and 12 hours later, they released me with hives all over my arms or wherever was itching at the time, and told me that I probably was suffering from Acid Reflux.  I did not believe this due to the allergic reaction I was having, they put me on steroids and Benadryl and I was back in the ER 2 days later as my thighs were one big hive about the size of cantaloupes and as thick as a pancake.  They gave me more Benadryl and sent me home with a topical anti-itch gel for my thighs.  I went to my Oncologists office on Mon and they sent me to the Dermatologist, this is where I finally received some relief.  In fact he stated I was having a severe reaction to the Taxotere and that it could take weeks to get out of my system, in which it did.  I was on 2 x Zyrtec a day with Benadryl at night for about 4 weeks before I started to feel better.  From the allergic reaction I also suffered shortness of breath that was also diagnosed from the reaction.   The chemo put me in to pre-menopause and immediately I started with the hot flashes, lucky me!

I completed 38 radiation treatments and then was told to start the Tamoxifen within 2 weeks.   I also take Effexor 225mg for Fibromyalgia and a vitamin D because I live in Alaska.  After the 1st week on Tamoxifen I noticed a weird headache on the back right quadrant of my head.  This was there everyday and although it wasn't 24/7 in the beginning it was getting worse.  I took Tylenol, advil, Excedrin Migraine and even my Imitrex for relief and could not get rid of it.  I finally called about 4 weeks in and told my Dr about the headaches.  She suggested that I stop the Tamoxifen for a week and see if it goes away.  After getting rid of one of my worse migraines about 48 hours later I felt great and headache free finally.  I called the Dr after 4 days and said that it was gone and they suggested that I shouldn't take the Tamoxifen anymore.

I went to the Dr's to discuss the next step for my BC and she told me I could do nothing, take a suppressive shot monthly, or have my ovaries out.  I am not interested in the monthly shot, what if I have another allergic reaction and have to wait for it to get out of my system?  I don't want to do nothing, then this Estrogen can get to any cancer cells and spread, again, not an option.  

I have an appointment with the GYN in Nov but would like to know more about what I should do.  I don't think they have the best care here in Alaska, should I go somewhere else for a 2nd opinion that deals with this type of stuff.  For my allergic reaction to Taxotere, they said I was the worse case they had ever seen and I am not sure that it was even reported being the delayed reaction.  I am frustrated and feeling alone here in AK.  What should I do?