I’m scared...

Ok so my period ended 2 days ago and it was super heavy the first 3 days then lightened up for the rest of the 4 days like normal... well now this thick brown discharge is coming out and I’m a little scared because my period started lightening after I had...unprotected sex... I’m pretty sure none of it got near my yoo hoo but I’m a little scared mainly cause the internet but I also learned it normal but if the flows light which it wasn’t until I did the deed.... does this mean anything?! Should I be worried?