Bad advice from ibclc ruined my supply

Ok so I had my dd on nov 23. Right away we had trouble with latching and bf was very painful. A nurse suggested a breast shield which helped with pain but didn't improve her nursing. I hired a ibclc and she suggested a supplemental nursing system and told me pumping was unnecessary. She was very wrong!!! Not only did she tell me my baby did NOT have a tongue tie when she clearly did she ruined my supply by misinforming me that if you supplement you don't need to pump. After a few days I realized my supply was gone and I've been struggling since to rebuild. I pump and nurse around the clock. I power pump, drink TONs of water, take yeast tablets, fenugreek tea and pills. I've seen little improvement in supply. I also had her tongue tie and lip tie clipped. It's been almost three weeks and I'm still struggling and thinking about giving up. Anyone else have the same struggle and get supply back?