I went back inside and checked the thermostat.
I was hoping someone had turned it off, or flipped the switch from cooling to heating.
When that wasn’t the case, I turned the temperature down on the thermostat, hoping the air conditioning would turn on. I turned it down one more time, but still nothing was happening. I was worried about calling the HVAC company, but I couldn’t think of anything else to do. I was talking to a HVAC tech and he was asking me all kinds of questions. After about five minutes, he simply asked if I had checked the batteries in the thermostat. I couldn’t believe that I hadn’t thought of this. I went out to the kitchen and grabbed new battery. The air conditioning immediately began to hum and I could feel the air coming from the air vents. I felt like such an idiot for not thinking about batteries for the thermostat.