Getting really worried.

So I’m 8 days late for my period, tested at the start of last week and was getting faint postives but on strip tests that I know can give false positives. From Friday to now I was getting negatives, I still have had no period.

I am getting really bad tummy cramps, sore boobs, feeling sick and very sleepy and have done since a week passed Friday.

I’m starting to get worried that I’m getting negative tests now but my period still hasn’t arrived ?