131 is a safe number. Take a deep breath. Try to stay away from any more of the higher carb foods. If he goes up now, you won't know if that's the extra carbs, or the natural progression of the cycle.
How much food has he had so far compared to what he normally eats? You don't want to fill him up in case you need him to eat later. I'd wait an hour to test, he's slowed right down.
He normally has a snack about now. Probably had a little more than normal. I'll test again in 15 minutes which will be +4 & go hourly from there if he's not sinking too fast.
Official surf report: Bama Kitty is surfing the blues tonight under a full moon. Rising slowly to 117 @+5.5. No snacks since PM+4. Not sure when nadir is. So many of his lows on Semglee have come at preshot.