Could I have PCOS? Advice please..

I’ve had irregular periods & I never really start the days I’m suppose to. Usually a week late. My last period raised an eyebrow when I had only brown period for my whole 4-5days except for my 2nd or 3rd day where it was deep red. I experienced no cramps which is weird cause I always cramp. This month I’m late by 20 days. Which is the latest I’ve ever been late. I’ve taken 2 tests (1 on the 13th & 1 last night) both negative. I have been having slight cramps every other day & I’ve been feeling bloated for a while. Like I’ve been having indigestion. Am I actually just late, am I pregnant & some reason I keep getting negative or is it possible to have PCOS? Help please.

Ps, I always use protection when I have sex.