A/C problem

[Premo34WV]

So Im driving yesterday in 95 degree weather and my a/c starts going in and out. It seemed like when I accelerated it would lose all coldness and start blowing hot air. If I came to a stop it would get cold again (not every time). Sometimes if I turned the ac off by pushing the ac button and still having air blow, then turn it back on, it would blow cold air again.

One thing i noticed is that when it stopped blowing cold, it would release a distinct smell. Definitely not a burning smell. Hard to explain, but I didn't recognize the scent. I've read about vents smelling moldy, but it only emitted the smell when the a/c lost coldness.

I'm not a heavy a/c user, mostly windows down, so only on really hot days. Anybody else have this problem?