DD is on her forth type of pill. Started taking them a few years ago for acne, the first one made no difference other than making her very depressed, the second was really good, cleared her skin, but after two years her periods got heavy and painful again, so Dr's suggested no breaks strategy. Big mistake, she really suffered by that regimen. Then she changed again, and now seems to be settled down, it's really hard to find the right one to suit. I suspect she is one of those people who just suffers from hormone in-balance, poor thing.
Invisible Women is great. DD has lent it to her BF to read..... good on her, and him
for accepting the challenge.