Never doubt your instinct on these matters.
One of my favourite quotes:
"Trust yourself and listen to yourself. If the person opposite is making you feel uncomfortable, and even if this person is an adult, it's never, never you who are wrong. You have an alarm bell inside you, listen to it when it rings".
This idea that I had an alarm bell inside me, that it was always right, always allowed me to run from the very first step.
That vague sense of unease isn't a vague sense of unease. It's your alarm bell ringing. And if it's ringing, it's because it's right to ring. End of story.
Now that I'm a grown-up, or almost, I've lost count of all the times that this alarm has saved me. And I'm yet to hear it ring by mistake. On the rare occasions when I did not listen to it right away, because it was so small I believed it to be out of tune, the next steps proved me she had been right, again, since the start.
Of course, at first, it was about protecting me against perverts.
Then I realised it also protected me against non-sexual perverts.
Then I realised it also helped me in many different occasions.
Then I realised it also helped me in my medical consultations."