Getting supply back

So a few weeks ago I decided to stop breastfeeding because I wasn't producing a lot at all and my son would just get frustrated on the breast and it was really depressing me knowing I wasn't giving him what he needed even though breastfeeding is something I wanted to do. I have had supply issues with all of my children and it pains me. Well I was wondering if there's anyway for me to get my supply back so I can try again? Or is it a lost cause now? I really want to try I just don't know what to do. The lactation consultant was no help.