Help!

My 95 Taurus is making a a high pitch noise that i've recently only noticed when im accelerating, and tonite when i got home i accelerated in my parking lot, then stopped and when i let my foot of the gas pedal the car was coasting without my touching the gas, only at like 1 mph, but i went around the parking lot about 5 times before i got really weirded out and parked it.....what the heck is going on with my car!??!