Cycle frustrations

Last month I had a two day period.... took multiple pregnancy tests and they were all negative ! This month my period was late by 5 days.... then on Friday I noticed some pinkish brown on my TP around 9:00pm So I just knew it was my period! It was light/ medium flow all day Saturday but still not much ! I wore a pad, but it only got a little on it. Midday I went to restroom and it was a thick brown discharge... nothing more... then later it was pinkish again.... and here we are Sunday and it’s gone! No period in site and no discharge or blood on TP !! all pregnancy test still say negative....I took on Friday morning!!!!