Two days late

lissa

I'm officially two days late. Yesterday after sex I had the worst sharp pains after sex it hurt so bad I screamed, they were back to back for a while, I had to go lay down. I took 4 stupid equate brand taste all had faint lines, and the other brand test were negative. I'm still having vivid dreams everyday, lower back aches, is there a chance I can still be pregnant!????? Anyone ever experienced this and was pregnant?????