Drop in supply 2 weeks pp

I am 2 weeks pp from csection. I have been exclusively pumping since my daughter was born. I was doing really well pumping every 2 hours (20 minutes per side). At first I produced colostrum, then my milk came in and my production slowly increased to 1.5 - 2 oz on each breast. All of a sudden yesterday though my right breast felt deflated and I have only been getting 15 ml (half an ounce) at most out of it. Also my right has been only producing an ounce to 1.5 ounces. I am really upset. I've tried oatmeal, increasing my water intake, relaxing, massaging my breasts, compressing my breast, hot/warm compress. I have also been adding in extra pumps on the right breast to try and send the message that it needs to produce more. I am just at a loss. Any advice would really be appreciated.