late period negative tests.

I know exactly how you feel as I am in the same situation.. and it's so frustrating!

My period is now 6 days late. I have a 28 day cycle and I have never been this late before. I know the exact day we had sex and I was ovulating that day. I have taken 3 pregancy tests at home since being late and they have all been negative! I don't know what the heck is going on. I keep thinking, did I calculate my period wrong this month? did it actually start a week later than I think it did and I'll be getting my period tomorrow? I can't figure it out... I'm pretty sure I didn't calculate wrong though, so what else could it be other than being pregnant?

It seems that if I did not calculate wrong.. then all the signs are pointing to pregnancy.. I've been having some symptoms such as tender breasts, peeing a lot more and I also have slight cramping/lower back ache.. sort of like I'm going to be starting my period but it hasn't come yet and I've felt like that for the past 4 days now.

I don't know.. what do you guys think? should I just wait another week and test again? if it's negative again at the end of another week and still no AF then I think I'll have to get a blood test to see what's really going on in there.

I just wish my period would hurry up and come.. or that I'd test positive! Urgh.. I've now gotten myself all excited about the possibility of pregnancy and if AF does come within the next few days I'll be really disappointed. :(