Can I be pregnant or is Is it because I stopped taking my birth control ? Completed the month of Jan. Bled 28-30 . Had sex Feb 1,3,6,8,23,28. No period yet . Headaches I feel nasueous tired nipples are sore increased appetite thrown up once but I was drinking and I didn t even have a lot to drink to throw up which was weird .. my boyfriend sperm is thick didn t think I would be able to get pregnant by him. Before BC my periods were regular and never late