Q: My car has an oil leak, my axle is hot, and there is shaking.

I recently got the passenger axle replaced, then an oil change. I now have an oil leak but can't see where so we raised it on the lift sprayed it off and noticed where the axle goes into the transmission was steaming as if it was really hot. Is it suppose to be hot? Since having the axle done my car shakes while driving I noticed my my tires are wearing out on the inside I know I didn't do an alignment but it goes down the road straight and I haven't been able to afford one yet. It also seems to be hard to handle and noisy as if something isn't right. My gas pedal and steering wheel and everything shakes. The front end sounds like it's clunky as it shakes. The steering wheel even sounds like it is loose everyone seems to think im just hyper sensitive and that there is nothing wrong with it. It's an acura tl it should be the smoothest car on the road. What can I check to determine the shake. Also should the axle be that hot. Is my new oil leak dangerous? Thank you