Whats wrong with my car?

I'be had my 1999 Dodge Caravan for a couple of months now and its been fine. The only issues I've noticed with it is it seems shakey between 50-60mph and oil spots in driveway. The other day in the highway, I was trying to p a car that was going slow, as I was ping, the other car sped up to not let me p, so instead of taking it easy, like I normally do, for some reason I kept speeding up to p. After I ped, my van sounded loud, like it was revving high. I got home and when I put in park, my oil lite came on. I checked my oil and was completely dry! It's not even due for oil change yet. I put 4 qts of oil in it. It's been a couple days now and oil is still full. It still revs high though and almost feels like its not changing gears. What could be wrong with it? Maybe a gear is stuck? Did I mess up the transmission when speeding up so abruptly? Could it be something simple like a spark plug? I don't know much about repairing cars. I'm hoping its something inexpensive!