Wanting to give up breastfeeding

My daughter is 5 weeks and I've tried everything. Tea, supplements, cookies, brownies, a ton of water, Gatorade, lemonade, beer, massaging, pumping every 2 hours, SNS, anything else you can think of I've probably tried it. The lactation consultants say "keep trying" but even they have run out of suggestions. She'll breastfeed for a couple minutes before she unlatches screaming because the milk stopped flowing. I pump 2oz a day. I hate feeling like I'm giving up but I don't know what else I can do.