Welcome.
When you mean squeaking, can you describe what the sound is more like, is it a rubber type noise, or metallic sounding. To be it could be the rear brake drum/disc/pads seized or worn. Wobble doesn't sound too good, have you got a wheel brace, jack up the car, remove the wheel, take it off and inspect, then replace and torque the bolts back up.
This is safety so don't drive the car till it's done.