Yes I too thought I was having a heart attack the pains were so bad but I have found it to be spasms attributable to low magnesium.
Lyme, HME, HGE, bartonella. 4+ years undiag. despite 10 drs.
Current meds: neurontin, cymbalta Prior meds: roxy, bactrim, doryx, amantadine, amox, minocycline, tetracy. IV refused by ins. Supplements: boluoke, alpha lipoic acid, AG immune, magnesium, milk thistle, resistant microbes, grapefruit seed ext.