Welcome to the STD forum. Congratulations on your approach to sexual safety. Although mutual STD testing is often recommended before couples start a new sexual relationship, it isn't often done.
Any genital skin condition that seems to come and go, or that can be seen only in special conditions (erect, good lighting required, etc) cannot be an STD. Almost certainly this has nothing at all to do with your new sexual partnership. If you have to look so closely, then probably nothing is abnormal at all.
See your primary care provider or a dermatologist. Despite your skepticism, if someone with that expertise sees nothing abnormal, then there is nothing abnormal. Feel free to add a follow-up comment to report the findings of a professional evaluation. Until then, I won't be able to say anything more. In the meantime, I would not worry about this at all and see no reason that you cannot safely continue your new sexual relationship.
Regards-- HHH, MD
Thanks a bunch for the reply. I will go ahead and wait a bit longer to see if any bumps get larger so they are more visible for the dermatologist. I will be sure to post any outcomes.