what to do.....
 

When I hit high speeds on the freeway (85-90 mph) my car hits a bump and changes lanes on me, what could be causing that? My steering also feels loose, how would I go about tightning the steering?

Front end boogie
 

You need to have the entire front steering/suspension checked - yesterday.

Could be a number of things including worn ball-joints, tie-rod ends, wheel bearings or a problem in the steering rack or the struts. Maybe you have tire problems. Check it out and lay off the 90 mph speeds until you know what the problem is. You could be a day away from something in the front end 'letting go' and causing you to lose steering control of the car. If that happens at 90 mph you're probably a dead man, especially on a crowded freeway.

Get it checked out. We don't want to lose any members.