Thanks for the query.
You have undergone an elective surgery
(open abdominal myomectomy
).In elective surgery chances of infection are less.Hence you need not to take antibiotics for long duration if there are no signs of infection.
If your doctor has advised to discontinue antibiotics then you should follow his/her advise.
If you notice any signs of infection like fever
,discharge from wound,abdominal pain
then you must visit the doctor.
Hope this solves your problem.