Yes it's common b/c progress is made slowly, and sometimes you go backwards and then forwards again. Don't get caught up too much on measuring it, just keep working.
What have you done that was really fun lately? You sound like you need to cut loose.
Dude...I went to friggin' Canada last weekend...by myself. It was awesome! But lonely.
GAL lately has revolved around either hanging out doing stuff by myself or with my D4. Othewise, I have been lifting and working on my physical health.