Aggravating car! I need help!

I really need someones insight on this...Ok here goes nothing.
I've had a couple of problems with my car, seeing how it's under warranty still i have gotten it fixed for a couple of things, on major..:Raditor
Back in august, my raditor went, and anti-freeze went right onto the road, my car stalled out, and smoke was coming from it, i wasn't sure what it was..But the mechanic had replaced my raditor and thermostat..Okay everything seemed find up until a couple of weeks ago, until I noticed my temp. drop below the normal range, and the heat wasn't working. So I took it in, and apparently I blew my head gasket, I was driving for a couple of months w/o a head gasket..but i had gotten that fixed..But until the day I got my car back..my check engine light went on, so i take it back to the mechanic and my car needed a nap sensor (sp) and a spark plug blew in my engine, OR Whatever you call that..So it seemed fine after they had fixed it up until last night after driving it on the freeway..the temp was dropping, but it seemed to be fine, until i heard a noise, i'm not sure what noise it was. So I drive it to work today, and it seemed ok, until i drive it back from work, it was starting to idle rough, i'm terrified it was gonna blow up, lol :naughty: but it won't, it's just that my check engine light came back on once again!!! I'm getting highly aggravated, I don't have the money to pay a lot for another car..But I'm taking it in tomorrow, ANY ideas of what it could be? Notice, I didn't have that many problems until after I got a new head gasket.

sounds like a bad mechanic. before you go to to any shops. call five shops tell them your issues. see if they all say the samething. but dont tell them what you got fixed . just tell them the symptoms:uhoh: