I havent heard of biomagnetism treatment for lyme before but I do have some have some idea of what is.
I treated my lyme with rifing ( another form of electromedicine) at first. I herxed a lot and then by the 3rd month I started to feel amazing. I was very happy with my results because I was so allergic I couldnt take meds or herbs. Then slowly bit by bit the recovery disappeared and in spite of further treatment I wasn't getting the results I logically expected were there.
My conclusion is that lyme is a very sophisticated stealth pathogen and it finds a way to protect itself in regards to electromedical solutions. In time it finds its way around the attack. You are fine if you dont rely on one treatment and use it in conjunction with herbs or abx but it is not enough on its own.
The die-off pollutes your body with all kinds of rubbish. My other lesson was to be very careful about detoxing with different strategies. Chlorella, cilantro, saunas, detox baths, metal detox solutions methylfolate supplements, careful pH management, lots of water, etc........ To switch it around some because every type of detox has its own strengths and weaknesses.
As they say this is a major illness and you need to arm yourself with a few solutions and attack it from all sides.
Over all the rifing made me better but it taught me not to rely on one option.
I dont know if I am helping here but I can relate to your situation. I wish you all the best in finding the means to get where you want to go.