Hi Pink! Please feel proud of what you have accomplished. So many moms never even try to breastfeed, let alone persist for any length of time in the face of obstacles like the ones you've been facing.
I know it must be hard to hear people push breastfeeding at you after you have made the decision to formula feed, but I hope you won't mind if I suggest one last-ditch idea: exclusive pumping. There are moms out there who manage it- I read about one who did it for a year in a book called "The Breastfeeding Cafe" and it gave me hope when I was considering giving up breastfeeding for reasons much like yours. Whatever you decide, I hope you know how much credit you deserve for giving breastfeeding your best try!