Seems like you could use more veggies.
Maybe some salad w/ lots of olive oil.
I'd say cut out the diet drinks...drink buckets of water instead.
Sugar free stuff really stalls me.
(Don't look at my stats now...I lost 30 lbs on Atkins a long time ago...you can, too.)
Give yourself some time to get things moving...the scale will follow.
Good luck!