4 days late am I pregnant?

I was supposed to get my period on 01/28 my cycles have been 28 or 29 days long with my last cycle being 26 days.

I'm cycle day 32 with no period. Last night me & my bf had sex around 5 p.m. & there was slight blood with the stuff that was coming out of me. I put a panty liner on for the rest of the night & used the bathroom several times with nothing on the toilet paper & the panty liner only had a bit of tan on it bc of how little blood was there.

So far today I have used the bathroom several times with nothing on my underwear or toilet paper.

I took 2 tests and they both say negative.

Can anyone relate, or has anyone gotten negative pregnancy tests but were indeed pregnant?