I think it is very common once a person has any kind of positive diagnosis, be it correct or incorrect, to notice symptoms, that may or may not be herpes. If you have actually blisters on the labia, you need to have these swab tested immediately. Can you get in tomorrow? Or go to Urgent care today? What you need is the PCR swab test, far better than culture.
Honestly, chemotherapy is the time that many people find out they have herpes because the chemo suppresses the normal immune response, allowing symptoms to emerge. I think you would be far more likely to have lesions during chemo than now.
Again, if you actually have blisters GET THEM SWAB TESTED!
Has your partner gotten test results back yet? Do you know you can order the IgG online without a provider order?