I had an interview two days ago and will be sending out my handwritten card tomorrow. I know this may have been a bad idea to wait; I didn't realize that it is suggested to send one as soon as possible. I figured that since there will still be interviews all week, I could send one a little later so it'll get to them around the time which they'll be done. Im aware email would have been quicker and an easy option, but I wanted to do something more personal which is why I opted for a handwritten card. Am I overthinking it right now that it was a bad idea to wait? Is it really a big deal to send one right away?