I am 21 years old. I've been on Kariva (a birth control pill). A day and half before I was supposed to get my period, I got brown discharge. On June 13th is when I started my period, until the 19th. On June 18th I woke up with a headache and very very nauseated. Vomited a quite a few times. Next day I didnt vomit but felt nauseated. Felt nauseated till about June 21st. I started getting very bloated around the 20th. I still feel bloated today (June 24). My nipples arent sore and my breasts do not hurt. I do however, feel some discomfort about where my left ovary is, or in between my two ovaries (right in the middle). I'm belching a lot, because of the bloating and gas in my stomach. I've been having headaches almost everyday. I do take my birth control every day, not at the EXACT time; lastest is an hour difference. But I have not missed one. Can I be pregnant even if I'm on birth control?