Around two weeks ago, I had vaginal sex with a stranger, first stupid mistake. Most girls my age don't worry about STDs, only pregnancy, so because I was on birth control, I didn't bother with a condom, second stupid mistake.
About 2 days after this occured, a small unnoticable cold sore popped up on my mouth, because we didn't engage in oral sex, I didn't think much of it. The past week, I've had a sore throat that won't seem to go away. Yesterday, I started itching in one spot above my genital area and today I noticed a small red bump there.
I read that herpes can be painful, and I haven't experienced any pain or painful urination or anything like that, so then I thought it might be syphilis. It's also only one bump, which is common in syphilis.
I know I should just go get tested, but does this sound like an STD or just a coincidence?