Nabothian cyst. Tubes fine plz suggest!

I have been diagnosed with bulky cervix and nabothian cyst recently when went for ct scan and Usg for right pelvic , hip and back area pain with UTI , UTI got cured but ocasional pain increases right before period and during and sometimes between period and gets better by its own recently went for follicular as dealing with infertility and dr said 16 mm follicle on left on day 10 but on day 13 scan she couldn't find it and she said I still have nabothian cysts and I am worried why this cyst is there and before UTI all my scan were normal I am also not taking any medicine for ovulation plz suggest why my follicle was not visible and about this cysts my period are getting shorter 22 to 26 days from last four months all my hormones normal I do have hypothyroidism and taking medication 50 mcg from last 3 years and h/ o of missed miscarriage normally concieved and after that unable to conceive and even 4 failed ivf cycles and both tubes fine plz suggest