Last night I was doing knit stitch on a practice piece of knitting in a small patch, 26 stitches long. When I got to the end I'd realised I'd messed up and I had 27 stitches. The yarn I'm using is very old (my mother in law gave me it to practice with but she last used it to make my husbands baby clothes...!) and a little frayed but not too bad to use, but I couldn't see where I had gone wrong even with most of the stitches being rather clear.
So in my infinite wisdom I un-did the last row thinking I could slip the needle back on and then go again, but this ended up with me being completely unable to get the needle back through the stitches. I tend to knit too tightly at the moment (I'm a beginner and only been doing this about 3 weeks! I tied off on the end and kept the knitting for reference but have since started a new practice patch).
If I slip a row off a needle like that, by accident or on purpose, how would I get it back on?