Yes, for people who get repeated low positive, they can definitely dip into the negative range as well. I think you can expect this over the years if you continue to do IgG tests.
We are using ARC point labs to draw blood now for the western blots as well as others. There is one very very close to you that we use all the time, if your zip code is the same. This is not a test you can order yourself. You need to contact UW and get the kit, 206-685-6066 and then either work with your own provider or do a telehealth consult with me and I will get you the required lab requisition to get the test done. You will pick up a prepaid shipping label prior to having your blood drawn and they will ship it for you.