Could be a couple of reasons:

1. Leak in the system
2. Compressor is giving out
3. Possibly an electrical issue

You can check your pressure levels in the system, if they are low, you have a leak or need to pump some freon (or whatever they are using nowadays) into it.

If that helps, it means the issue was that. If it stops working after a month or two, you have a leak in your system.

If your pressure levels are good, it might be the compressor. Check the electrical connections, maybe something shook loose. If those are fine, it might be the compressor itself. I'd give that to check to a mechanic.

If none of the above, maybe your alternator or your car battery isn't giving it enough juice to power the system.

Good luck.

When filter is out, check for leaves or blockages, put a vacuum in there clear it out

Best start would be to put UV dye in the system (a bottle of its cheap) run the system for a while, and then break out the black light, and check every AC line. Chances are you’ll find a leak.