It sounds like it is low on Freon. Take a look through these links:
Now, it could be something freezing up. Now, the best way to determine if the Freon is low, is by checking both the high and low pressures. You need an AC manifold kit to do it. Take a look at this link. It shows how to evacuate and recharge the system. I'm adding it specifically so you can see the manifold unit.
Now, I don't know where you are located, but often times, a parts store will lend you the kit. If you can, check the pressures and let me know what you find. Additionally, I will need the outside temps when it is checked.
If that isn't possible, here is a link that explains how to charge the system using a common recharge unit from a parts store.
Let me know what you find or if you have other questions.
Monday, February 17th, 2020 AT 6:48 PM