Have you tried reducing opacity to less than 100% in the Options Bar at the top? If your strokes are overlapping,try reducing the pencil size using the left bracket key on your keyboard. [
Try using the Brush Tool instead? Pencil is for filling in pixels perfectly. Brush is more for making realistic looking strokes.
You will never guess!!!
I reset my tools and it went back to normal. I know enough to be dangerous to myself!!
Thank you ALL for your help!