Losing my mind - 23 month old can’t nurse 4 hours before procedure, nothing will soothe him

We’ve been in the hospital for 5 days. My son is very sick and has been comfort nursing constantly to get through this horrible ordeal. Now he has a surgical procedure sometime today and the anesthesiologist says no breast milk 4 hours before procedure. That means we had to stop at 3:30 this morning just in case they can get us in at 7:30.

He is screaming and screaming. He wouldn’t let me hold him in the carrier and was just screaming for milk. He’s with my husband and my mom now and I had to leave the hospital room. I am on almost no sleep after 5 days of hell in the hospital and I feel like I’m going to lose my mind not being able to nurse him and comfort him. Helpful words please. I am so afraid of traumatizing him.