My husband is accusing me of cheating 🤦🏼‍♀️

Let me preface this by saying, I’m 35 weeks pregnant on strict bed rest and haven’t even been allowed to drive a car since I was 24 weeks pregnant. We have two kids who go to my moms most days because of my bed rest restrictions. My husbands sister and her boyfriend were here visiting this past week from out of state to help me out which was so nice.

Today my husband got home from work and went into the fridge to look for something to eat. In the fridge he found a Starbucks bag with an everything bagel and cream cheese inside it. I cannot stand any form of cheese and let me stress again haven’t been able to drive in over 10 weeks. The label on the bag had no name but said 1 of 4 items and that it was picked up drive thru. I was lying in bed and he went CRAZY. Asked me where the bagel came from while screaming at the top of his lungs. I was so surprised and said “I literally have no idea maybe you forget buying it this past weekend when you went” (completely spacing it could have been his sisters who just left yesterday). He then (still screaming like a lunatic) said “how the f**k would I forget buying a bagel?”. I said I can’t even drive and am on bed rest how the hell would I have bought it? He said I must be having an affair and be having my secret boyfriend bring me bagels everyday he comes over for sex?? Like WHAT. THE. F**K. My sister in laws boyfriend also left a pair of boxers here in our guest bedroom and he brought that up saying it mustn’t have been SIL’s bf but the guy who I’m having sex with left them here by accident! So I text my sister in law and she CONFIRMS it was her bagel and her boyfriends boxers. I show my husband the messages and he says his sister must be covering for me🤦🏼‍♀️🤦🏼‍♀️🤦🏼‍♀️ He thinks that at 35 weeks pregnant and on strict bed rest I’m legit having an affair. I’m stunned. We’ve been together for 10 years and he’s never once accused me of anything like this. He was screaming so much he made me cry and then stormed out of the house. What the hell do I do here? I’m floored. I UNDER NO CIRCUMSTANCES WOULD EVER CHEAT ON HIM! Advice please.