Ever since I began using the Diva cup 7 months ago, I have had frequent periods (every 2-3 weeks). I started birth control pills to help regulate my periods but it's not working. My doc doesn't think my cup could cause the frequent periods. Do any of you have a similar problem? I really don't want to stop using the cup to see if that makes a difference to my fow, because I love the cup so much! I don't have any other health issues, although I've been having diarrhea sometimes.