This all started when I got a jumpstart after leaving my lights on. I was driving and out of nowhere my car wouldn't move in reverse. The engine just revs . I drove to get.to a transmission shop and they checked the fluid which was good so he said I need to replace the transmission. I drove home and the reverse gear started to work for a short time than it stopped working again. That same night I left the keys turned over in the car and the batteRyan died again. Now when I try to jump start it . It makes this funny clicking sound. And it won't even start the engine. Now my car is just sitting and I can't even start it. What is thproblem