no doubt in my mind...................yes see a gyno
Most cysts are benign, but until that is correctly diagnosed never assume!!
Absolutely go see your GYN, if there is any suspicion then you should have an MRI which is more precise. Again if there is anything abnormal I would have a gyn/oncologist evaluate you. I am not saying you have cancer but a gyn/oncologist is the correct Dr to make the right diagnoses.
Good Luck