So far doing what the LC suggests has been pretty effective for you - so get another lesson and hop back on the bike!
I would just focus on getting BM into bub, and I didn't care how it happened - as bub got stronger, BF became easier, and expressing became more of a pain in the butt. You will be very lucky to get a screaming, unhappy baby to attach properly- so if some EBM calms him down once you are at that point then use it. But always try to attach first - sometimes he will surprise you and attach well, and other times it will be pretty ordinary.

And you must look after you as well - get the TMI looked at too!