So I tried touching the two battery cables together to reser the pcm, as I have read lots of post recommending that for fixing high idle. After doing this I realised that the high idle is because I was low on coolant, for some reason it does that whenever the coolant level drops to a certain point. But now my starter goes click click click... What did I distroy? Its the same sound you get when the battery is flat but it isnt. I put a charger on the battery just in case.

A **** poor connection will cause a starter to just "click".

It was working fine until I tried to reset the pcm..

Did you remove both battery cables from the battery? Did you clean the cable ends and posts before you reattached them?

Bad battery connection

The issue with the idle is fixed, filled up the coolant.
Starter clicking befause of snow and ice on the terminals