Playing the Waiting Game Again...UGH!!!

I saw my RO again this morning. It was the first time since he terrified me last week. In retrospect, he was only being honest, and I appreciate that. I don't want him to sugar coat anything, but it doesn't keep it from being upsetting. Just for a little background (I probably should have just added this to the thread I created last week as an update...hmmm.oh well, I'm already here and typing, so here it is. I was dx'd February 11 (a Saturday - surgeon was a friend and called me at home with results), had BMX on February 13 (the following Monday) - it was a whirlwind. I went from perfectly healthy (I thought) one Wednesday, to dx, BMX, and back home by the following Wednesday. When I got my final path report, I was 90% ER+, 5% PR+, HER2- (actually 1+ but considered negative), 4 lymph nodes (one with a 1.8 cm tumor in it), LVI - Stage IIIA. Waited four weeks for a PET scan to rule out mets (it was completely clear), started dose dense A/C chemo in March, Taxol in May, went for a quick getaway trip Memorial Day weekend. While there, I spent one day playing laser tag, racing go karts, agressively riding bumper cars, etc, etc - very active things. Shortly thereafter, while still taking Taxol, I began to experience some rib soreness/tenderness opposite side. MO ordered a rib detail x-ray. It showed a "possible" hairline fracture to a rib (probably from the agressive bumper cars), and an incidental "spot of mild sclerosis", which wasn't there at the time of the PET scan. MO said it was nothing to worry about. The tenderness has stayed with me, but it's never even been enough that I needed a Tylenol. Last Thursday, my RO (who is much more cautious than my MO) asked if it had gone away. I told him no - no better, no worse - still there. He ordered a repeat rib detail. The spot is still there. It has not changed or grown in any way. But my RO says it is suspicious, although he thinks it is probably benign since I have not been taking chemo for the past two and half months since the last xray and it has not changed at all. He said if a malignant spot had popped up DURING chemo, it would have had to be growing fast (not a characteristic of my original cancer), and should have continued to grow in the last two months since I have not been taking anything to prevent it from doing so. So, over the weekend, I was somewhat relieved. However, this morning, when I went for my radiation treatment, his nurse told me that he had called my MO, discussed it with him, and they both agree that a repeat PET should be done as soon as possible after finishing radiation. So, back to hypochondria for me. I keep trying to remind myself that, worst case scenario, it is a single bone met to the rib and very treatable (possibly just with the Tamoxifen I am scheduled to start next month). Oy vay - why can't I be one of those people who can just put things out of my mind and not borrow trouble from tomorrow? Am I crazy to be freaking out this way?