Thanks for the query.
There is less possibility for pregnancy
as there was no ruptured follicle or luteal cyst and there was no thickening of endometrium.
There could be slow development of the ovarian follicle
So after consulting your doctor you can continue the follicular study
for few more days.
If no increase in the size of the follicles is noted, better to go for withdrawal bleeding and repeat the ovulation induction