miscarriage last month, missed period this month

Srames

I had a miscarriage last month, I was probably only about 3 weeks pregnant. this month I am now 4 days late on my period, I had to positive home pregnancy test, as well as quite a few negative. all the tests were taken with the same urine sample. I had a blood test done yesterday which says negative. is there a chance that I could be pregnant? Or is my body just out of whack?