Nipple discharge

Good evening everyone, 

I don't know if I am in the right place or not. 
Since Friday last week my right breast is painful at touch and noticed green discharge from my nipples if I squeeze them. I felt the urge to squeeze them just like when you breastfeeding...I don't know why.

I went to see my Gp and my prolactin level are normal, as I have irregular period they suspected a pituitary tumor, but because the prolactin is came back normally they referred me to a breast clinic.

They prescribed antibiotics even though from blood test there are not sign of infection. 

Is someone of you had experience something like this? 

sofia