Talk to Gynecologist on High Prolactin

30yrs old female married since 4 years having one child 3 years old. I breastfeed to my child for 2 years at that time my prolactin was high which is normal, also had not my periods for 2 years. After quit breastfeeding, my prolactin didn't back to normal level and my cycles also not back. On investigation, found hight prolactin (100ng/ml) used brotin tablet for 3 month and prolactin came to normal range(12ng/ml) and menses got regular and after that i left medicine and my prolactin again rised up.

I dont have any other complain. weight is normal, ultra scan is okay. thyroid is also norma. no PCOS history. no irregularity of menses ever faced before marriage. no miscarriage faced.

Please answer my question will be highly obliged as i am very tensed over this.

*Why this is happening? *now i again started medicine and i also wanted to conceive what should i do? *how much possibility i will conceive naturally? and what should i do for this *when should i go for infertility treatme