Hi. I'm A 32yr Old Mom Of 5 (youngest Is

Hi. I'm a 32yr old mom of 5 (youngest is 10mts). I have 3 cycles now with a "grain" type texture lasting 5-6 days. This last cycle I had, lasted for 15 days! Not only was it "grainy, sandy" type, but also had long strands of clot. Clots range in color from purple to pinkish, to grey. Is this normal, what should I do? Tnx.