Dude- How's life in Clovis? I'm from Hanford
If you put in a new water pump & thermostat, the very first thing you need to do is see if it's leaking or boiling out the overflow reservoir. If you are losing coolant, then there's your problem. If not, and you have the OEM clutch fan AND SHROUD, then drain out all of your coolant & flush the system; then re-service the entire system with distilled water and Water Wetter.