I have been on birth control for a little over 3 years and have had no problems. I am starting a different type of birth control tonight after having seen my doctor today and deciding I wanted to have a period every three months instead of monthly. I just got my period last week and am still on it right now. My partner finished inside of me yesterday. I understand you have to wait/use a different form of birth control for 8 days since I’m starting a whole different birth control medicine. If my partner finished in me yesterday, would I have a chance of becoming pregnant this week since sperm can live up to 5 days? Thanks!