A sub-partial hysterectomy involve the removal of a woman's fallopian tubes, the upper 2/3 of the uterus and the preservation of the cervix.
Is this what was performed during your surgery? I don't know if your increased appetite and sleep issue are related to the surgery.
Is there anything else going on in your life that could be impacting your sleep or causing you to eat more? For example, any new stress factors, concerns or issues? That may be the source of your problems.