Sometimes it is hard to diagnose or put sense to everything till you know all the symptoms. Assumptions are made as I do not know if you have limited knowledge or access to tools. I am guessing you want to try to fix this problem yourself.
There is one statement that I am unable to follow you on. It is with the A/C compressor. The compressor will cycle on and off as needed based on the pressure that it needs to keep the system performing. So I am not sure I know what you mean by:
"As it stopped, i heard the compressor kick into overdrive (like it does when it is cooling the air before blowing it through the vents right as you turn it on.)"
Right now, based on what I am trying to piece together, the following may contribute to what you have described:
1. You have a vacuum leak.
2. Your A/C system pressure is low.
3. If you have a digital climate control, the system may have a problem- but may be reacting to #2 by turning the fan speed down.
4. Broken blend door.
5. undetermined yet.
6. The Gremlins are back.
I would recommend to start your diagnoses with the vacuum canister and or checking all vacuum hoses - even the one that is on your brake booster. If you don't want to remove hoses or find locations hard to inspect or check, purchase a spray can of carb cleaner. Spray it over the canister or hard to reach vacuum locations to see if the engine speeds up from an idle. If it does, it indicates a leak as it sucked in carb cleaner. Be careful around hot headers- fire risk if you use too much.
The easy way is to hook your engine up to a vacuum gauge which would indicate whether there was a leak or not to start off with.
If you start with this and report back, I am sure others will help chime in to provide some better direction.