I'm 20 years old me and my bf have been trying to conceive I had unprotected sex the whole time I was fertile and when i was expected to ovulate on july 10th I was supposed to start my period it didn't come I was feeling nausea and tired a lot then the 11th yesterday I started cramping and noticing lil pink spots and i mean soo tiny when I would wipe then it went away at the end of the night no period so 2 days late then this morning when I woke up to go to the bathroom I wiped and noticed bright red blood on the tissue its still occuring and its like a spotty flow this is the last day of my expected period why would I start bleeding now?? last month this didn't happen could I be pregnant??