try reaching la leche league. they could probably put you in contact with someone who can help.Or see if your doctor can recommend a lactation consultant although it may not e covered by insurance.
If yur supply is gone, im not sure there is much you can do. I would try consulting with a BF lactation specialist. BF can be such a challenge, I BF DD at night and if im off work i try to nurse during the day but my supply is supper low during the day but full during the night, bcuz your body makes supply according to demand. I supplement during day and now im going to start wening her from the breast and just strictly to formula. I hope there is something you can do. If there isnt dont be so hard on yurself, you did a good job, some breastmilk is better than no breastmilk. I didnt BF my son who is now 14 and he never had any medical problems, I BF DD and she has been getting colds left and right.
I would ask for help at the herbal supplement store--there are things you can take to increase milk supply (mother's milk tea, fennugreek i think are 2)but i don't know if it works after you stop producing milk. Also contact your local hospital about a breastfeeding support group--the instructor might know something that'll work. Good Luck--I really hope it works.