I think i might have a blood clot?

A few weeks ago i got out the hospital cause i had a seizure. I'm a heart patience also, and i had brain damage before, but nothing serious. I had blood clots before, but only superficial, and varicose whatever you want to call it, and i had only 2 DVT's in my life after major surgeries. Now my left leg is swollen, and my ankle is very swollen along with a dark spot on my foot? could the blood clot busted? It don't hurt or anything..