Ya man we all have slumps like that but whats important to remember is you will get through it one way or another. I'm not sure if you've read this quote before but it sure as hell motivates me when I'm down.
"The Iron never lies to you. You can walk outside and listen to all kinds of talk,
get told that you're a god or a total bastard. The Iron will always kick you the real deal.
The Iron is the great reference point, the all-knowing perspective giver. Always there
like a beacon in the pitch black.
I have found the Iron to be my greatest friend. It never freaks out on me, never runs.
Friends may come and go. But two hundred pounds is
always two hundred pounds."
Also you know if you feel unmotivated it isn't necessarily a bad idea to take a few days off and let your mind and body recovery. All that stuff will only help you in the long run.