you can start breastfeeding again I quit for 2-3 weeks and started again if you are having latching problems start breastfeeding with a nipple shield many women have low supply and can get it up so baby is exclusively breastfed. like east textas mom said there are herbs and meds to increase milk talk to lactation and try to get your supply back
Giving up on breastfeeding doesn't make you a bad person and it's not the end of the world. For the record, my son was breastfed and he still got sick. Whatever your decision, don't beat yourself up about it. Your baby will survive on formula and it won't make them inferior in any way.
Have you tried contacting La Leche? They help breastfeeding mothers. They might be able to help you either A) Start breastfeeding again or B) Get in contact with a milk bank. They helped when my friend was having problems. Good luck! You aren't a bad mother for not doing it......not everyone is able to. I hope you find the answers you are looking for <3