Re the hole, Diane. If you want to get rid of it, the best, and probably only thing, to do is to go back to that point and knit it again. By that I mean: take your needle off the stitches and unravel the knitting to that point, then put the stitches back on the needle and start knitting. To be honest, not advisable in your case. You could try going back stitch by stitch, but that may be a bit too risky for you as well.
Maybe you should just call it an irregularity. All good hand made things have irregularities. :-)