As you have undergone C-section ,you might have asked your Doctor to search for any abnormality in the left ovary like Dermoid cyst
.Your doubt would have been clarified.
Any how,it is seen in Ultrasound
Or you can plan a Diagnostic Laparoscopy
by your Gynaecologist,where in the entire abdomen can be visualised by keyhole method.
Then, you can proceed accordingly.
back with the above findings,i will clarify further.
Nothing to worry.
Wish you good health