ok my cars temp is going way up and when i turn the car off and look under it there is alot of coolant dripping down from the far back side of the motor. That annoying buzzer comes on when the car is just started when there is more than enough coolant in the car. And i just replaced the thermostat so i have no idea what it could be.

 

If you're lucky, you have a leak in the coolant system, bad waterpump, or clogged radiatior. If you're not, you have a blown coolant seal and need a rebuild. If you've let the car temp get anywhere close to H, most likely it's the second one. Sorry to be the bearer of bad news.