Q: Won' start or shift

My heater quit working and stopped blowing warm air. My check engine light came on while I was driving, and then my rpms went up. My engine feels and sounds like somebody put my car into neutral while I’m driving! I wonder if it’s going into overdrive. It feels like my engine is going to blow up when I shift to the right. I need to always pull over and turn off the car. When I drive 30 miles it takes me about an hour to get there, because I have to pull over and turn off the car many times on the way to my destination. Then when I start my car the key doesn’t want to turn and gets stuck in the ignition. I can’t shift the car while trying to start it and the key won’t turn. I need to move my car which is sitting on the street. I want to put it into neutral, so I can push it, but I can’t even to that. Do you have any idea what is wrong? How can I fix this? Thank you from a very frustrated driver.