Recently I lost my virginity (about three days ago). It was someone that I met off of a dating app which obviously is not very responsible. I asked all the questions like "Do you have any diseases" and got no as my answer so I thought it would be okay. I wore protection and I did not shave myself because I read online that can prevent diseases from getting onto me. A person told me she had a disease after the fact, and I don't know whether they're being truthful. Should I be concerned?