Engine Overheating

My car overheated. I let it cool completely, eight hours later I started it and eased it home. It never overheated but would fluctuate from normal to above normal. Upon inspection I found that my ac compressor was locking up and my tension pulley was bad. So I put a new compressor, pulley and thermostat on. The water pump is about three months old, and seems to be working. I emptied the coolant from radiator, and ran a garden hose in it to make sure it was not clogged. Put it all back together and filled with new 50/50 coolant. Started the car with rad cap off and it shot fluid out the radiator, then seemed to work normal. I added some water, let the air bubbles dissipate and put the cap on. Took it for a short drive and it started getting hot (never overheated). So I parked it. As I got out I heard a hissing sound. Both radiator hoses was swollen and steam/smoke coming from the thermostat housing where it meets the hose. I have no coolant in the oil, no smoke from tail pipe, no coolant lose, and I pulled two plugs to check for coolant. They was dry. I am at a loss as to where I go next. I cannot afford to take it to a mechanic right now. Any help would be appreciate.