I'm sorry sweety. You know it's unreasonable but that doesn't change anything. For whatever reason you have that fear. I am okay with small spaces, my fear is heights. I get one step up on a step ladder and my knees start shaking, I get dizzy, and I get nauseous. It's horrible. I know it is unreasonable, I can't even stand to drive/ride on roads that have almost no shoulder and any kind of drop off next to them.

So just because it's unreasonable doesn't mean it's not real. I'm sorry you're going through this and I hope they can do something to make this one not so miserable for you. Just take a deep breath I'm sure they will find something. They know how bad it was last time I'm sure they will find a way to make you more comfortable. Try not to stress over this from now until then. I know it's easier said then done, but please try.