The cutoff between negative, equivocal and low positives are arbitrary. if you had an equivocal IgG test 6 weeks after a potential exposure, I would say repeat in 6 weeks and if still equivocal, forget about it. If you are still worried about this, you could do that western blot now. Enough time has passed for an accurate blot.
Sometimes people have a protein in their blood that looks similar to a herpes antibody protein and it can look equivocal on the IgG test.