Meg, my fibro came on like a ton of bricks. I was perfectly pain-free and 45 minutes later I was a mess!
I'd be careful with chiropractors, too. I was hurt by one and, once I stopped going, the back pain got better! That was my experience with chiropractors.
Yes, I had the palpatations but once I had all the heart tests, including wearing a monitor, heart problems were ruled out. So, now I know what is causing them and I just "dismiss" it when it happens and get busy focusing on something else. They usually go away. Actually, I haven't had any in about a year. (Saying this was just the "kiss of death" for me now! LOL)
As far as the periods go, I'm like Chutz. My subscription ran out about 13 years ago. But, I didn't notice any difference at the time, but I didn't know enough to look for it!
Sherrine