Having a second child symptoms and conditions

I've been a pill taker for twenty years (maybe more). I switched to loestrin FE in November. I realize that any bc takes the body some time to adjust but this has been pretty brutal. I gained 12 lbs and I cannot get it off no matter how much I work out and/or don't eat. I'm depressed too yet I have a beautiful life. My doctor says you sometimes need a year for your body to adjust to a new pill... I don't know if I can wait that long. My kids think I have lost my mind because I cry so much. I too think irrationally a lot more than in prior years. I will ask my doctor about this next week. It seems like this pill might have serious effects on the thyroid? Most of the symptoms described are also associated with hypothyroidism.