A few weeks ago my Jeep started to sound like it put its own supercharger on it. Turned out it was a bad a/c bearing. I changed out the bearing and when I turned the ac on after, my ac was warm. Before I changed the ac bearing my ac was blowing cold air. I just read the pressure on the system with one of those ac pro hoses(yes I know it isn't a professional reading, sue me, I'm a broke college kid) and my reading was almost 100psi. Not sure what happened or whats going on. Any help on how to fix it or what to do would be much appreciated.

 

Assuming that is low side pressure, you definitely have a problem. It is really difficult to diagnose AC problems just looking at the low side pressure. Here is a good site that you can start with. http://www.agcoauto.com/content/news/p2_articleid/257. That chart says high low side pressure indicates a weak compressor.

You may want to check if any local auto stores by you rent the gauge set to read low and high side pressures. Otherwise you may need to get it to an aC shop for a proper diagnosis.