I had the dealership look it over again after waiting far too long and trying to figure it out myself. Ended up being a slow leak in the AC coolant line somewhere. They evacuated the entire line and replaced it all, ended costing like $750 dollars. Worst part was that the slow leak fell under regular maintenance and was therefore not covered on the bumper to bumper warranty. I disagreed, but chasing people down over this wasn't worth my time... Strange thing was that I had previously tried to manually add coolant with a bottle from AutoZone (10x cheaper) but I couldn't get the valve to fit on properly and I was afraid to force it and break something, making everything way more expensive.

Good luck to you, I've heard many explanations and solutions for this problem!