when I go over even small bumps it acts like it is going to shut down?

My car has been revving up when I turn it on for the last couple days and when I go over even small bumps it acts like it's going to shut down. It started bout 2 days ago on way back home from town my engine started revving really high between to the 6-7 range and wouldn't shift into gear at all I had to pull over about halfway home to manually shift it into first and that didn't help either. I live about 20 or so minutes from town and I barely made it back home before it started to stall out and shut off. when I turned car off it did smell like something was burning, but no smoke coming out of from hood was actually cold and smell only last couple minutes so I parked it overnight and then drove it bout 1/4 mile to work and back home it still revved up but not as bad. Then I drove it again today after putting Lucas stop slip in, it barely made to store which was about 10 or so minutes away from my house. It shifted a little bit but then started to stall and did the same on way back from store tried to stall again.