Okay! So I am in my 20's and last month me and my SO had unprotected sex. I then got my period the end of the month but it was different than usual. I got my period August 28. Now it's the 19th and I've started spotting a week before my period. I'm also nauseous a lot lately. That's all I've got but of course I'm excited. I might be just jumping the gun...but is it possible that this spotting is implantation bleeding or a sign of pregnancy?