Sounds like you need a little help!

OK.....It Could be a number of things

1st things id be doing is flushing out your water system, radiator etc.

Check out for air in the system something as simple as a small leak in your heater matrix will allow air in the system causing temps to raise rapid stylee.

Do you have an aftermarket Intercooler fitted? If so does it use the aftermarket/original fan? is this wired the correct way is it blowing rather than sucking air?

Best of luck in sorting it out M8