I recently had a phone interview with a big N company for an entry level technical position. I received an email today saying that they weren't sure about moving me to the next step so they wanted to do a follow up phone interview. They asked for 3 available dates and times so I quickly replied with 3 dates a month out without any explanations. I had already done this when the recruiter first contacted me to give myself time to prepare, so I soon realized that this might have been a mistake.
I found this post for a similar question, but the difference is I am currently employed with about 1.5 years of experience, so not a student anymore.
This recruiter usually replies pretty quickly but It's been more than a few hours since I sent my email. How worried should I be? Should I do something to amend the mistake?