7 weeks post

Just looking for some thought and opinions on birth control. 

I went to my 6 week check up on Monday and the doctor gave me the mini pill for birth control. I had told her that I had stopped bleeding a week prior to my visit and how I felt that I probably got my period the week before and how it was over now. While at my visit I said that my supply sort of decreased, not a lot but enough for me to notice and for me to get down about. She prescribed Reglan for me to take for 2 weeks. 

That's the back story leading up to what I am looking for thoughts and opinions on.

So I started take my Mini pill on Tuesday and Reglan on Wednesday. My pumping supply has dropped significantly. I use to be able to pump 5 ounces every 4 hours with my little breastfeeding. I was EBF I was mostly pumping and I haven't had any issues with "my system" until I started these pills. Could it be the birth control? Even though everything I read says it's not suppose to? Does anyone else have similar experiences? I feel like pumping 2 ounces every 4 hours when I don't breastfeed in between isn't worth it and it's making me feel really sad. 

Thanks ladies