What Are The Symptoms Of Pregnancy?

Hi, I suffered from Pelvic inflammation disease about 5 weeks ago and was treated with 2 weeks of antibiotics, a scan 3 weeks ago showed all had gone back to normal. I had a normal period on 3rd April and I should have come on 2nd may but didn t come - my cycle is usually like clock work, ive had tender breasts for 2 weeks, heartburn and headaches but 2 negative hpt tests. Got my period 4 days late yesterday with very bad cramping and pains in my ovaries and it s been very dark brown but not as much blood as a normal period. My husband have been having unprotected sex since i got the all clear 3 wks ago, could I be pregnant?