05 Pontiac Vibe with Electrical Issues / Low Voltage

I was able to do some more checking with my multimeter and it was staying around 14.4V when under a load and revving the engine but it dropped around <13V when I applied a load and let it idle. I just drove it around for my lunch hour and it ended up stalling a couple times and the lights were still flickering. I stopped and shut the car off, turned it back on and it started acting mostly normal again. I checked the voltage coming off the alternator and it was still low during idle.