What do ya'll think?

Mariah • Stay at home Mommy to a handsom almost 2yr old! Wife of almost 5yrs!
Little back story. My son was born on Jan 23rd. I breastfed for the first 4days, but then I switched to formula because I started to develop postpartum depression, and had latching issues because he is tongue tied (which I asked in the hospital due to latching issues and they blew me off). I was going to just pump, but with the PPD I felt soooo overwhelmed and didn't. Fast forward to now. He's already on his second type of formula due to issues pooping and now with the new formula he's having diarrhea and is spitting up every feed. And earlier I went onto amazon to look at my registry to see if there was anything off of it that I wanted to get. Saw all of the breastfeeding stuff that I had put on there... Now I'm sitting here sulking wishing I would've stuck it out with the pumping at least to give him breast milk considering all the problems he's having with his tummy, and then try BF again once his tongue tie got fixed... So I guess my question has any one had any luck breastfeeding again after not doing so for so long? I'm 4 weeks postpartum today.