I'm knitting a flat piece with the circular needles. I think I did drop one and add one because when it happened, I tried to fix it but I couldn't figure out what I did. So I picked up and dropped a few threads until I found what looked right and kept going, but when I got to the end it still didn't look right.
The pattern is K3, P3 across until the last 4 or 7 which you knit. I'll have to keep looking for videos also, I couldn't figure out what I did, so I didn't know which video to watch and I couldn't find the fixing mistakes videos.