Help! Spotting/light period

Me

I got off my BC end of November and had my normal break through bleeding for a week. Then dec. 22 starting spotting and had 2 days of regular bleeding the dec.26-27. Now I’ve been spotting the last 5 days! Like I mean super light, I noticed a little bit of white looking tissue here and there today. I took a pregnancy test when my period was supposed to start yesterday and negative. Anybody else ever have a super super light period or this much spotting leading up to it? I was on Bc for 10 years so actually periods are new to me.