Okay so I'm stupid. I took plan b 3 times with in 7 months all because of really messed up situations. And last time the condom broke he was pulling out but he came inside me so i took the pill with in 15 hours. The last time i took the pill it was two periods ago. I had my period 10 days ago. I don't know if i was ovulating when the condom broke. So i was reading online the pill less effective after the 3rd time. How likes is it that it's true? And how soon can i go on birth control? I know the plan b pill isn't 100% of me not being pregnant but how like am i not pregnant? Also is the pill less active during ovulation?