You should take the blot when 12 weeks have passed since your last sexual encounter in April.
So sounds like now would be fine. You can work with your own OB or you can work with me – if with me, you can make an appointment on this website by following the link to “get a western blot”
IgG is the test you want, and it is OK but not terrific
IgM has lots of false positives and the CDC says never to use it
PCR should be done as a swab test from a concerning lesion, never from blood.
Terri