Plz i need help

i was driving my car today cruising on the highway at 80mph,when out of nowhere i see the needles in my cluster go back to 0 and my abs,oil,and e-brake light come on. When i pull over i see my temp. needle all the way to the H,so i let it sit for a bit.i tried to start it but it wont,it cranks but wont stay on,i check my coolent and it was fine,so was my oil.Funny thing though when i took the radiator cap off i was expecting some hissing or for it to start leaking,but nothing happen like there was no preassure at all.1hr later i get towed home,and i try to start it and my temp. gauge still at H,it wont let me start it. im guessing is a sensor,but idk much about this cars so any help will be appreciated thanx
 
ok to make this a bit more clear lol,my engine has been off for the last 5hrs and everytime i want to start it,my temp. needle is in H.any ideas?
 
yeah it seems to me to be your thermostat did you check that out cuz you got all the problems as if you have a broken thermostat
 
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