What to do after positive HPT??

I don’t have a GP or a family doctor or OB. Normally when I get super sick or injured I just go to a doc in the box which is hardly ever. I have health insurance through work so I never have to pay anything but I just don’t know what to do if I were to get a positive test? Everytime I’ve called to become a pt at like a gyno they always say I need a referral from a GP but I don’t have one? Also if I were to go to a doc in the box after a positive to get “confirmed” do I take that to a gyno/ob and try to become a pt that way? I feel like it’s such a dumb question. I’ve just always avoided doctors offices bc growing up in a household with a hypochondriac was very tiring and I saw a lot of stuff that was unnecessary and bothered hospital staff so I’ve always been too scared of that.