After I have my baby and in the hospital ?

Alexsis • Having a boy named Shandin with my boyfriend of almost 2 years?
Okay so I'm trying to figure out what clothes I should bring for me in the hospital... Am I able to wear my sweat pants or loose fitting pants after I give birth? Does the hospital make you wait a certain amount of time before you can change? This is my first baby and I've heard different things so please help ?