Cooling issues. S14

[EatSleepNissan]

Sorry for bringing this up yet again but none of the threads I've read.matched my symptoms exactly. I have a 1995 S14 it overheated sitting still last night so I brought it home and now I'm trying to diagnose the issue. Well I turn the car on and try to.heat it up quicker with the A/C blaring it starts getting hot then it looked as if the thermostat opened and it plummeted. Staying normal now. Turn the car off let it sit for a fee scratching my head turn it on again and sure enough after a few it goes up and up. Turn it off and let it sit. Turn it back on now its staying cool again. Bleeding issue? Just replaced the thermostat on it last month. Help please?