Question about a job offer.

I am 17 years old and just two days ago I received a call from a Burger King that I had applied to. They were just calling because they wanted to schedule an interview. I’ve been extremely sick with a virus, stuck in bed so that’s the reason as to why I’ve never called back. Constantly throwing up and I didn’t want to call and they try to set up an interview the same day. Is it bad that I would be calling back 2 days later after they called?