I had unprotected sex a week after my period. I didn't think much of it until I had small amounts of brown clottish like blood when I wiped a week later which I read up to seem like implantation. I went to the doctor during this implantation like bleeding and they tested a negative pregnancy, even after I told them it'd be too soon. It's been over a week since then, I'm still feeling exhausted, sick, achy, moody. Does it seem like pregnancy?