On May 18th was the first day of my periods which normally last for five days. On May 25th, I (thought) I had protected sex but my bf says he took off the condom but withdrew, just to be sure, i took P2 after 2hrs, and another after 12hrs. So now on June 10th i had bleeding that lasted 4 days, it was light compared to my normal periods. I got scared so on June 21st i decided to get an IUD, implanon but now its 11th July and i havent had my periods yet, could i be pregnant?