I saw a lot of good people not get a job they should---mee included---- and I just retired after decades with the competition.
While I didn't put the other guys out of business, I impacted them in a big way.
Maybe ask the people you interviewed with to keep you in mind if things don't work out and also maybe could they refer you to anyone else?
Ask if you can use them for a referral.
I did all of those things.
Don't worry, things happen for a reason and usually work out to your advantage.
Relax, this too shall pass.