well I was thinking last night, and I wanted to throw my last card, I will take out the radiator to check it up if it still have blocked lines.
how possible would it be to have some blocked water lines in the head or the block? does such a thing happen?

Never say never, but I doubt it

forgot to write that when the car is moving the heat starts to drop but it seems to be slower than before.

That basically points to a bad visco clutch.

is the pressure test using the meter on the spark plugs?
yes, see here, very simple stuffhttp://www.amazon.com/Actron-CP7828-.../dp/B00020BM28
http://www.justoffbase.co.uk/Compression-Testers