Dark Brown Discharge?!? What’s it mean?? PLEASE HELP ASAP!!!

I started my period around the 16th of this month and ended it, and then a week later I suddenly started getting this dark brown discharge out of NOWHERE. I know about discharge after and before periods to clean the vagina out but this was way after. To give a little backstory, before my period I experienced my first Yeast Infection and used 1-Day Monistat to cure it and my period blood flushed the rest of it out. I was good for a couple days and now I have this stuff coming out of me. PLEASE HELP! I don’t know what it is and I’ve tried to search it up multiple times to find the cause. (Yes I took a pregnancy test and it came out NEGATIVE.) I havent had sex in WEEKS and which caused me to stop taking my birth control pills.... I really need to know because I used a glove to examine myself down there and it feels a little swollen on the inside of my vagina too. It also itches sometimes.