Dexcom and Insulin Pump

I use the G7 and a Tandem insulin pump. For the past week my readings have been higher than normal when not eating. What would be a usual reading of 90 would be 120. Kept on checking calibration and it was within range. Same thing was happening overnight. Readings were 110 - 120 while sleeping instead of around 90.

Looked at my pump app and saw exercise was showing. Went to the pump and turned exercise off. Readings returned to normal levels. Must have turned on exercise by mistake when turning the pump off when showering.