My 5 yr old had bad stomachache before bed. i went into her room to check her temp under her arm while she was asleep it was 95.7 she's sweaty too?

Axillary temp: Axillary temperatures are not accurate. Abdominal pain may be viral or may be a sign of other infections such as strep throat or urinary tract infections. See how she feels in the morning to determine if she needs to be evaluated.

Here are some ...: It's most reasonable to bring her to local ER or urgent care as soon as possible especially if such condition is new or infrequent events. Of course, bring the detailed info on the onset, degree, duration, evolution, and progress of all symptoms and their related discomforts over time to Doc for timely analysis + physical exam + tests as needed so to deduce possible Dx fo reasonable Rx/ care.