I'm 8 days late on my period and have had cramps like I'm going to start my period for the last 3 or 4 days now I took 2 pregnancy test when I was 3 and 6 days late on my period but I got a negative both times I've felt kind of sick the past 4 nights. I still haven't gotten my period what is going on?

It might be that your period will just show up late this cycle. Wait another week and see what happens. If still no period, try another test at that time. If negative, either wait until you would expect your period for next month and see if is shows, or you could see your doctor sooner.