I am 34 and haven't any kind of a period in 4 to 5 years . I was tested for early menopause and that is fine.?

I have been on the birth control pill cryselle for many years. My doctor was not alarmed at the fact that I haven't had a period in so long which I thought was strange. I talked to a different doc and we are going to take me off of the pill. Just want to know if anyone has been through this and any ideas on why. I am always feeling bloated and tired all the time. Always warm and sweat a lot. I am 5' 7 and have gone from 130 pounds to 182 in 3 years. My thyroid is normal and I just don't know what to do.