Did I blow a headgasket?

Hey I was just having a little fun around town and like 1 min away from my freinds house and I did a lil 10-11# run through 1rst and now it wont idle. I start it up and quite a bit of smoke comes from the tailpipes, which normally theres some and that may not be abnormal since the car needs to be revved to keep it running. I checked my oil and it looks normal. What else can I check? Full of anti-freeze and nothing is leaking. Any ideas what it could be?

Well me and my freind were checking it out and first we found the coolant hose was under extreme pressure. Bled that off and kept looking around when i found out my bypass valve turned into a blow off valve when it decided to blow off the discharge tube. That created the huge vac leak tthat wouldnt let my car run. Thanks for the help tho, good to know i can count on my stangnet freind in a crisis.