2000 Chevy Impala Control

I had an accident about 2 months ago where I hydroplaned and the side of the car hit the retainer wall. Did a 360. There was no real damage just scrapes. But now it seems that the car slips around turns and on wet roads. Scares me to death. Cant afford to take it into the garage right now. It feels like every bump I go over like I could lose control.
What makes a car sturdy? Feels really loose.