Can I bring up my supply to mostly BF my twins

I have 2 month old twins (yesterday) who are nursing, getting pumped milk, and formula. We had a really rough time getting their latches good so when they were first born and lost so so much weight I was given a medela symphony pump through insurance and I started pumping. I was able to meet about 2/3 of their needs when they were smaller. I was pumping every 3 hours, but gradually that became less and less often between having twins and an almost 3 year old. So now I pump 3 times a day and get about 1/2 of what they take - they get that in bottles and get formula the other time. I went as long as about 8 or 9 days without nursing at one point, but for the last two weeks or so have been putting the boys to the breast regularly most of the time before their bottles and sometimes when it seems like they just need a little top off or to settle down for a nap or are extra fussy and need the comfort. Their latches are great right now...it feels how nursing should.