What a difficult choice to make! If you don't do the Remicade on time, you risk a flare and also a build-up of antibodies; yet, if you go to the only facility in your area you risk Covid. What a horrible place to be in! I don't have an answer for you in this catch 22. I'll be praying for wisdom for you in either case.
Have you talked with your GI or Surgeon to see if there is a possibility of having the infusion at home with a home nurse infusing it? Maybe they have another idea we haven't thought of to protect you during this crazy time. Just a thought.
Thinking and praying for you!