I've talked to my gyno about how i had been having irregular periods on Yaz, so she switched my over to Loestrogen 24 last week, the previous 2 weeks i've been bleeding through out the day, not alot a day but still an amount. I've also been taking a few vitamins; so could that be the reason? or could be switching to a different pill be the reason? Ive read articles about a uterine lining and fibroids and all of that, but could it just be from switching over. help