While the body is recalibrating it is important to let it do whatever it needs to do.
The less you restrict the more trust you gain.
So if you need to use the bathroom, go ! Right now, not in 5 minutes.
If you need to sneeze but have no tissue, so what.. do it... all over the place, it's human nature and was never meant to be bottled up.
If you need to fart or burp... let it rip ! Your body is releasing toxins it doesn't need
Show your body you got it's back and it'll show you how to lift the habits of control over itself that once served you, but you know longer need.
Don't resist.. flow with it and trust will grow naturally.