Weird discharge

I’ve missed my period, it’s been at least a good 3 weeks since I was meant to get my period. And now I’ve started getting this rly yucky odour coming from down there and my discharge has become to much heavier.

TMI- it’s become like slimy and gooey idk how to explain it but normally it isn’t like tht.

It comes out in clumps, kinda like blood clots however it isn’t blood, just discharge.

I’ve been having unprotected sex for a week, could tht hv anything to do w it...?

Ahhh guys help idk wot to do :(((