Pregnant?

Okay so I’ve had brown discharge twice now in the same month. They were both different tho. The first time it was more mucus-y and lasted for 3-4 days. The second time it was more like a real period(needed to use a tampon) but only lasted for 2 days and there was some bright red blood. This is over two weeks btw. I’ve taken 3 pregnancy test and they all came out negative (on three separate days). Am i pregnant??? At this point I’m tired of being worried.

-i had protected sex

-i was not on the pill