Did I completely ruin my chances of getting this job?

After a job interview that went exceedingly well, I decide to send a thank you email. It was short email explaining my appreciation for taking the time for my interview, and I mentioned a few additional valuable skills I can bring to this position. (i.e. attention to detail) The title of the email was; “Thank you for your time and the opportinuty” – opportunity spelled incorrectly!

I cannot believe I missed this before I hit the “send” button, and of course I mentioned my strict attention to detail in the thank you email. In an effort to immediately correct my small typo, I sent a small follow-up email to acknowledge the misspelled word, and how embarrassed I am as well as how this rarely happens.

Did I just shoot myself in the foot? Or am I simply over-reacting?