Help please as many replies as possible

So I finished my period on the 16th January. I’m not due my period until the 13th of feb and for the last four days or more I’ve had brown discharge, today more than normal. It started like brown ewcm then today it was more like what you get at the start of your period really brown. My periods are regular so I don’t understand what’s happening. Plus I have had mild cramps too.