Could I be pregnant ?

My period is five days late, which isn't normal for me, being that my period comes regularly every month I thought I may be pregnant. Today I started cramping a little and had some brown discharge, but that was all, I took 3 pregnancy tests and all say negative. But I still think I may be pregnant .. am I crazy ? Or am I pregnant? I'm thinking I should wait a few days to see if my period comes if not I'll take another test. HELP !! 😩