Sharing a hotel room with friends

My friends and I are going to a convention in 2 weeks and we will be sharing a hotel room together. It's 2 other people besides me. I'm really like sick to my stomach nervous. I'm a very deep sleeper and I have an overactive bladder and with some of the medications I have to take the side effects are drowsiness so waking up sometimes is impossible. My friends don't know this and I'm quite scared to the point of not even going with them because of this. Any tips?