What's going on?!?!

Ok here lately I have been haven sex more than normal then 3 days b4 when I was susposed to start my period I started I think like it was blood on the tampon but it would never complete fill it up and there was brown stuff on it to with blood clots and I have been haven cramps on and off with it well then I wiped this yellow cloudy clump then since then I have been haven pink red brown discharge like what's wrog!!