UTH broke right before a feed

So I just fed about an hour ago and I decided to quickly make sure the temperatures were okay with my temp gun. Well, they're not. I think my under tank heater broke, the readings everywhere are around 75F. I use a heat lamp in conjuncture with a UTH, so I still have the lamp to keep my ambient temperature above 75F. I know I need to fix it, but I also know you can't disturb a snake who has just eaten or you risk regurgitation. I feel like this is a catch-22. Do I fix it now, risk upsetting him and possible regurgitation, or do I give him a few days with just the heat bulb, and risk regurgitation due to improper temperatures? If I was to fix it now, I wouldn't even know how. Need advice. Thanks.

What are you using to regulate the UTH?
Husbandry needs to be corrected.

I am using a thermostat. This one: https://www.amazon.com/MTPRTC-ETL-Ce.../dp/B000NZZG3S. Usually my temperatures are fine, 89-90 on the hot side and 78-80ish on the cool side.

I would still appreciate advice about the problem at hand, now that we've established my temperatures are normally correct.

You need to fix the husbandry.... That is the answer.
Move it to a tub/holding tank and fi the problem.

I would plug the mat into the wall just to make sure its the mat and make sure its not a thermostat failure.