Need help! Dropped a cast on stitch

I am creating a hat with ear flaps, I had to cast on after I attached the ear flap and have joined and started knitting the first round but one of the cast on stitches feel off. I know how to add back on a regular cast on stitch but am at a loss with what to do right now.
FYI- I’ve double up my yarn to get a bulkier look. image|900x1200

Welcome to KH!
What kind of cast on did you use? Depending on the cast on, it may be easy to add in that stitch or you might be able to ignore the dropped stitch and increase one on the first row.
Are you using a pattern for the hat?