I'm scared I may have an STI... For the reason I have these bumps where I shave. They are like little pimples and have hard puss. Could they be warts?

Molluscum? This sounds most like molluscum contagiosum, a minor sexually transmissible viral infection. It's especially likely if the bumps are shiny pink and if some of them have dimples in the center. Or maybe folliculitis (hair follicle inflammation) from shaving. Google MC (spell it out) for photos and more info. And see your doctor for confirmation and treatment. Also need testing for other common STDs.