Hie. I had unprotected sex with my boyfriend on the 20th and he came inside me. My period was supposed to be due on the 23rd but it didn't come. I did however have the cramps and pain so was anticipating it but nothing came. Then 5 days later on the 28th (when I'm normally supposed to finish) I had some dark brown/blackish discharge. It carried on into today (the 29th). I'm really worried. Could I be pregnant? Please can anyone offer their opinion. Thank you