approaching week 7 weigh in

Got in some great cardio this week.  So far I have hit the gym 4 of 5 days, 45 min on the treadmill doing 3 miles and 15 min on the eliptical machine.  Should be a good week....right?  I hope so...but I must admit, I dont feel like its been a successful week.  Its weird, I feel like I gained this week...Im scared to weigh in.  Which is crazy really, I have worked out all week so far and have been eating well.  I did get back to taking my metformin daily and have had a slimfast shake every morning as I havent had time for breakfast.  Maybe I should nix those things.  Guess I wont really know until Tuesday.