pregnancy symptoms, bleeding, and other questions!

Hey Ladies, so here's my current situation. I had unprotected sex om May 13th. My period is pretty regular and it always come between the 25-30 of every month. However I starting bleeding on the 18th of May. Very light. About a week or so ago, I started to feel lower back aches, nausea, headaches, and no appetite. Then on the June 13th, I started bleeding again..waaaay too soon. It was very very light. I took 2 HPT and they both came back negative. I feel very pregnant though. Maybe it's too soon? I did go to the doctor today and got a blood test done...waiting on results. Any of you ladies gone through something similar? Or know anyone who has been pregnant and bleed? Thanks!