Help, I think I hurt my leg running?

I kinda over did it..i started running 5 miles to start off..like right off the top...and i did not stretch a lot...now my leg hurts....i can't walk right...i really REALLY miss running ...but my damn leg..its the upper part of my leg that hurts...the pain goes and comes...i haven't ran for 4 days...i REALLY miss it..i have kinda active shadow boxing here and there ...but for the most part nothing...and yet it still hurts...what can i do...what should i do.