Think I came on too strong, what next?

[Gemini]

In your shoes, I would text him with a note asking him how he's doing, and that "you're sorry if he felt you were coming on too strong", ending with an "I hope to hear from you soon" (or something of the sort) to close it out.

Then? Wait and see if he replies over the course of the week. If he doesn't? It's time to move on.

OK, I totally agree with this. Send the text as outlined above, keep it very simple. If he doesn't respond, let it go. If you keep texting and call him too, you're going to come off as a stalker, and that's not what you want.