I'm sorry your having problems. I think it is a good idea to add a pumping session in and maybe rent a hospital grade pump for a month or so as a option. It can be hard but try to play some relaxing music look at you LO or a picture and smell some clothes or a baby blanket.
I used to hold a rolled heating pad where my son would be laying to create the heat to confuse my body. Sounds strange but I was willing to try anything for those let downs.