I started my birth control pill on the 15 or 16 of October and my boyfriend and I had unprotected sex on the 19. However, we did the pull out method and I sucked off his cum. But I read that sperm can live outside of the penius for 20-60 mins. I know that birth control isn't effective until 7-10 days later after starting the pill. It's been about 4 weeks and I've noticed that I've been extremely tired lately, nausea after I eat, weight gain, food cravings (only for sweets and pizza), cramping (comes and goes), and weird/detailed dreams. My boyfriend thinks I'm pregnant, but I took a test and it came out negative. I just stopped taking the pill about 3-4 days ago and I now have withdrawal bleeding (started November 27), and I just want to know if there's a possibility that I could be pregnant ?