Glad to hear things seem to be a little better for you.
You got some awesome advice. I had to switch to formula myself as my son was allergic to milk products and cried, fussed, and spit up a lot on my milk. Once he started on the formula it was like a new child. He is almost 5 now and really really healthy and happy. (I used WIC myself!)
On the flip side of things, my cousin breastfed all of her kids and one was just allergic to some foods she was eating herself. So she had to limit those foods and then her daughter was fine with feeding again as well.
Just take it one day at a time and know it will get easier as Jeremy gets a little older. Make sure you take care of yourself as well. Many mothers get a bit of postpartum depression that can make everything seem much worse too.

You seem like a great mom with a lot of love for your child. Good Luck and God Bless.