formula to breast milk advice?

I really want my baby to be fed breast milk, I'm producing enough to give him some from my boob, I've been trying for days to make it work, he has a great suckle and feeds well. Minus he doesn't open wide enough so I'm in constant pain, so the latch isn't good, I've tried a lot to make it work, but I can no longer take it. I've started to pump, just still not quite enough to bottle feed. I've been giving him formula for the last day, while pumping and dumping. Do you ladies think if I keep pumping to keep increasing my supply? I'll be able to get him if formula bottle feeding, and do breast milk bottle feeding? Has anyone done this? I'm okay with formula feeding until I can produce enough to switch.  Thank you