What do i do if i hooked up with a girl who may have not severe, im not sure?

i just recently went for my blood test and got the regular cholestrol lipid profile and blood pressure check. my father got all that plus aids stds and check because he is a vascular surgeon so he deals with blood alot and hes a risk for getting it from his patients. its just rhumor and i dont hink i have it. but how do i find out if i do without going back for bloodwork?