Normal clots?

Rachel
Hey ladies-
 I've started my cycle like normal yesterday but my flow was a lot lighter than usual, then I passed a few small clots. I didn't think anything of it, but today I've had mostly straight blood clots, some big and some smaller, with a flow that is slower than what it usually is (TMI- I pulled my tampon out and it was covered in blood clots but not really filled with blood). I'm cramping a ton and feel just gross. 
I've never experienced clots like this before and am trying not to get spooked. Is this anything anyone else has experienced before?