2003 Toyota Corolla, 78k miles, 4cylinder

We went somewhere a/c was good...left location and ac was no longer working. Clutch is not clicking on/off. AC is just blowing hot. About a 3 weeks now have been hearing squeeling under hood like belt was loose. Appears the serpentine belt is only one there is and that is still there.

It is the heat of summer and I just can't afford to take it in the shop. Please help diagnose if you can.