1996 Toyota Camry Still cannot figure out!

I have a 1996 Toyota Camry. The only problem with it is that it shakes when I go above sixty, but my front rim is bent so that solves that. The other problem is that I have a reoccuring oil leak that seems to come from no where. I had the head gasket replaced and the oil pan screws tightened. I'm not much of a mechanic and can't seem to locate the origin of the leak. It doesn't seem to leak as bad when the car is off, but when running, the leak is almost every 3 seconds.