@sylvia67 As @becsbuddy and @loribmt mentioned, I am undergoing chemo [Revlimid + Dexamethasone + Bactrim] for multiple myeloma, also in my 3rd round like you. I got my third shot just before starting chemo in Aug. In fact, we had Pfizer vaccines [me 1/24/21 and 2/14/21] and as soon as they talked about it, I called my oncologist, he said "get it if you can". So, I ran down to Walmart and said I was starting chemo the next day ad they gave me the third shot right away.

I have had only one night of gastro issues, thank goodness. Did get the Revlimid rash on lower legs during first round, but it cleared up during the one week break, not to return [knock on wood!]

Wishing you success on your SCT and hope you will let me know how it goes, okay?
Ginger