He sent me a dic pic...

I've been talking to a guy for about 2 weeks. He's really really sweet and we have talked about what we're looking for in a relationship. We both want to be with someone who will love us forever, etc.

Today after my shower he asked for a picture of me (my face) and I sent one because there's nothing wrong with that. Right after, he responded with a picture of his dick... and I was extremely uncomfortable and still am.

We're both 17 and I just feel wrong for seeing that. I do want sex in a relationship eventually, but a pic after only 2 weeks of talking? I've barely even gotten a hug from him the first time I was with him in person. We haven't even kissed and our relationship isn't official.

Currently he is texting me on every app we contact each other on..

What do I do..?

Am I overreacting?