Normal?

Hi, i was just hoping for some reassurance and/or feedback on what is going on with me.  My last period was on September 10 and it has been regular ever since i started when i was 13 (it always starts 5 days earlier then the last one).  So by my calculations i should have started two days ago.  We have had unprotected sex for the past month i would say at least....eighteen times...minimum (sorry, probably tmi).  The past week and a half i have had tender breasts, lower back cramping, light stomach cramping, off and on headaches, fatigue, and nausea. Two days ago my nausea switched from being mainly all morning to now mainly at night before i go to sleep (diarrhea, horrible cramping, etc. sorry tmi again).  I have taken four HPT and all have come back negative.  Is this normal? By my calculations i am 2 days past my missed period and i don't feel like i am about to get it, which is weird.

[Lucey12]

I know I was always on time then one day I was a week late. Now its a week late every month. Seeing as how you have had unprotected sex a lot lately you coudl be pregnant. You could be getting negatives because the HGC isnt high enough yet. (you arent very fall along) My husbands mom always got negative tests when she was pregnant with all 3 kids so ya never  know. Keep me posted.

[tarajanes]

cycles can be off for many reason,if you ovulated later your period would be late.try testing in a week.if nothing get a blood test thjis will confirm.