" I also have another wiring question about wiring a regular ceiling light where a fan/light was mounted. There is a red, 2 blacks tied together that are going to the single switch and the whites are wire nut together. Same goes for the ceiling box. I was able to get the light to turn on but when I do, it kills power to the plug on the wall and also the master bath light."
black/red/white romex (14-3) probably goes directly to fan box location. Use red wire to switch light and keep all blacks tied together should fix that... Typically to a fan light location there is a three wire romex (red, black, white) so that you can switch the fan and light separately if needed. If you have two blacks in the ceiling light/fan box you might have power at the box feeding down to the switch on the black wire. In order to fully understand it, you will need a voltmeter to determine where the power coming in is... and then figure out what wire feeds the outlet, etc... and then simply make sure nothing is switched that isnt' supposed to be. But my guess is... that if you use red wire as switch leg to light, and tie all blacks together your issue will be resolved.