Hospital neglect

i was admitted to the hospital for a deep vein thrombosis,stayed 4 days.Was released on a Friday.Over the weekend I had increased pain that had moved up into my groin area.I went to the emergency room Monday morning,from the suggestion of a nurse taking my blood in the hospital lab.The doctor asked why I was there and I told him about the increase of pain and how it had moved up into the groin.I also told him I was just released 3 days ago for the DVT.He felt for a pulse in the tops of my feet.Never did he look or touch my very painful groin area.He gave me 3 percacet and told me to follow up with my primary doctor later that afternoon,which I did.She sent me back up to the e.r. for a stat ultrasound.I didn't go to x-ray for approx.4 hours after I got to the e.r.What happened was the blood clot in my leg grew over the weekend,even though I was on cumadin.I've had blood tests done and I don't have a genetic disorder.So my question is ,is the doctor at fault for dismissing me?