Question

when trying to sleep Teresa tosses and turns for a hour or more wakes frequently and then wakes earlier than she wanted in the morning Theresa is experiencing what

Answer 1

I beleive the answer is insomnia.

It could possibly be sleep apnea? it's a sleep disorder that effects the persons breathing.

Your question doesn't give me many details. You can simply say that Teresa is restless? Sleep apnea is quite rare, I would go with insomnia.