My 20 month old woke up this morning crying and whiny. She has no fever, is eating and drinking normal, just very unhappy and cries like she is sick?

Sending a message. Take her to the doctor to have her checked out. She may have an occult urinary infection, ear infection or increased abdominal gas which may be indicative of impending diarrhea. Aside from these few causes there may bea myriad of other things that may be wrong.