Not losing

Recently went up to 7.5. Had 3 shots already and only 1 lb lost since. I should be going up to 10 soon. Already have them in the fridge but was going to extend the 7.5 if it was working because I still have some 2.5’s and 5’s so dr said I can take them and wait to go up and use the meds I already have. But not sure what to do. Any tricks or tips on how I can shake up this plateau? I walk 10K a day and always drink my water. Lately have been eating some Raisin Bran for breakfast, salad with chicken for lunch, and protein with veg and small amount of carbs for dinner. Just wondering if anyone has some words of wisdom for me.