Unless your HbA1c has drifted well into the diabetes range (48+), I can't see it even being mentioned. I believe Metformin is only allowable under a few circumstances (like PCOS) for pre-diabetiics. Even if you are back at or over the threshold, I would feel confident (if it was me) of being able to negotiate time to try to get my HbA1c down again, given the background, and existing digestion issues.
Do you test on a day-today basis? If so, what have your numbers been doing over these last few weeks in particular?