Vehicle Overheat problems of the 1999 Oldsmobile Alero

I purchased my 1999 Oldsmobile Alero on 4/20/00. Four days later, the car overheated. It overheated approximentley 10-12 times after that, each time with me bringing it back to the selling dealership to fix the problem. Each time I took the car back, something in the engine was replaced and I was told it was ok. No more than 5 miles down the road, the car would overheat. It seemed to be a mystery to everbody. Finally, I suggested to the dealership to possibly change the thermostat. They did and that ended the overheating problem. Now, a month later, the factory warranty is up- so olds wont help me, the dealerships warranty is up, so they wont help - they blame olds. I do have an extended warranty, but I dont think it covers a lot of the repairs that need to be done. Ive already had to pay $250 before it totally broke down. And besides this has been going on since I got the car when it was within the "bumper to bumper". The engine will not hold antifreeze (been going on for about 2 week), we put it in and 5 min. Down the road its gone! its started overheating again, and right now is totally undrivable!! I have to use my works company car (lucky they are so nice) to get back and forth to work with. I bought a 1999 so that I would have a reliable car that I could trust to not give me these kinds of drastic problems! - so bad that it doesnt even work anymore!! I have been on the phone with Oldsmobile numerous times and they are of no help!!! so, I've come to my last straw, ive gone to a consumer lawyer to help me figure this mess out. . . Oh yeah, did I mention that I am a 20 year old female - what do I know??? - I have saved all of my receipts, have pics, and a file with olds. Someone has to do something!! I want revenge and to be compensated for this!!! and the way the lawyer talks, I cant sue unless they dont contact me when they recieve the letter of demand to fix the car. But obviously they will. I want more than that. Im ready for a battle!!.