Tummy Ache

My poor Coco has been getting tummy aches recently. She is waking me up in the wee hours of the night with her tummy a-grumbling and her poor little sad whine.  I'm not sure what is causing the distress, but she is losing her appetite.  Of course this is just momentarily. It just takes a little coxing and just is scarfing her food.  It has happened 3 times so far.  If it happens again, I'm afraid it will have to be a trip to the vet.  My poor little baby.