When taking off from a stop, the car will occasionally feel as though something is holding it back from the rear end. Eventually it will jerk and then run fine until the next time. Today, I had parked, started to back out a little ways and it wouldn't go. Rested a couple minutes, pushed the gas harder. A couple loud clunks and it went, another loud clunk or two and we were moving forward, got the car to the house with no further issues. Afraid to drive it anywhere else now. I am a disabled single lady with limited income and no other transportation. Please help! Thank you!