Beginner. Dropped stitch? Help!

Making a blanket and I think I dropped a stitches few rows down and somehow picked up another stitch. How do I fix a dropped stitch when it is singular to one row and a few rows below where I’m currently knitting?

All I can see from your pictures is a hole. Take a picture further away and see if you can make it less blurry. What stitch are you doing? Are you sure it’s a dropped stitch? Can you see the stitch that dropped?

Here’s some basic help, but if this isn’t it let us know. Garter and stockinette are different so more info will help.