No flow

Mariah • Nerd. MCU <3
So I regularly breastfeed. But when I have a chance I try and pump and store some up. Well for the last month. Every time I try and pump I only get 1oz... Or less. But if I stick little man on it he eats and eats. It's not coming out when I pump!! I've tried changing the suction and the pace. No go. I'll express. Nothing. But then when I feed him on one. It stimulates the other and it will leak. I try to pump then, and it stops. I don't know what to do. I have to have 5 servings by Valentine's Day so his grandparents can keep him so hubby and I can go on an awesome date. ): HELP!