1996 Chrysler Concorde my car is smoking

My car is a 1996 chrysler concorde, about 7 mths ago it was miss firing and I took it to the shop but they couldnt figure out why it was missing. Then the car had this loud noise from it like 3mths later I took it to the shop and they said it was the catalytic convertor. The noise stopped but a couple of days later I took it back to see if they could figure out the miss again and he notice that the catalytic convertor was very hot. So I got the vacuum test done and I had to get the intake gasket replaced. Ok now last week the car was running hot, so I replaced the thermostat. The smoke stopped and the car was running fine, so today I noticed that smoke was coming from the inside of the car near the radiator and a liuttle was coming from the tail pipe, I looked closely to make sure it was coming from there and it looks like it was. My husband got me to back my car up cause we smelled antifreeze and when we looked down there was a little puddle of anti freeze on the ground. Do you think its my head gasket or something else?