When to take off compression garment and change padding after BBL?

I am 2 days post op and have a drain thats set to be taken out in three days. I am afraid of taking off both garments they put me in because I don't think I'll be able to get them back on. However, I'm also having a hard time standing and peeing and it's really grossing me out. Should I just wait until my post op appt and have my PS help me? I feel like I'm very ill informed and it's freaking me out.