Used car needing new motor after 2 weeks, could this fall under Georgia's fraud?

I purchased a used car, 2 weeks ago, from a local dealer. Before purchasing I did talk to the mechanic/sales person that was at the lot, test drove etc... and always had someone with me when dealing with them I know buying used, as is, that there would be some repairs needed, I wasn't expecting a brand new car. Noticed when test driving, that there was a "rattle" from the engine area, but this wasn't all the time, asked the mechanic and was told it wasn't anything to worry about and it was a good car. Within a few days, had the same shop do oil change and tune up, within a week it starts overheating and noticing that the coolant had to be topped up just about daily 2 weeks in, I took to another shop regarding the "rattle" and to have it thoroughly checked out - received call yesterday - that the head gasket was needing replaced, as well as the "rattle" was from the bottom part of the motor and would need replaced as well. No Lemon law in my state, but is there a recourse I have? I called the lot yesterday, and have yet to receive a call back regarding. Also have been told, there are pending lawsuits regarding same dealer and "doctoring" of cars to sell.