I lost my virginity last weekend, and now, to the right of my pubic bone, some blood-red spots have appeared. My girlfriend was also a virgin, and we used a condom, so there's absolutely no way there could have been an STI transmitted, because of these reasons. My girlfriend suggested that they were caused by rubbing and friction down there? There's a small collection of them, about 7-8 and they develop heads that can be squeezed just like facial-spots but a lot smaller. My girlfriend also bled a lot as it was her first time, could this have anything to do with it if she bled on me? I'm a bit lost what to do here, I'm fairly certain it's not an STI but I have no idea what it could be either.

Thanks for your help, in advance.