Gaining fat fast on humalog

I have only used Humalog 3 times after workouts only in the last 5 days and I already see a huge fat gain that was fast?



Am I doing something wrong? I don't know if I want to use it anymore after only 3 times cause I don't want to have a stomach of fat hanging over my pants.



1st time (Sun): 3IU Humalog pinned after workout with 50 grams dextrose/50 grams whey protein/10 grams creatine monohydrate in water. 1hr after pinning meal - 1 can tuna (in water), 1/2 cup oatmeal w/skim milk/25grams Whey in water. 2hrs after pinning-25grams whey protein in water.



2nd time (Tues): 5IU and same as above



3rd time today (Thurs): 6IU and same as above.



I do cardio also after workouts for 30min burn 300-325 calories.



My fat gain has happened only after using slin and using 10g of creatine monohydrate powder with it instead of 4 purple caps of creatine kre alkaline.



And I was using 50g dextrose after workout already before using insulin.



Any idea what this could be? could it be creatine monohydrate bloat/water gain more so than fat?



I always weigh myself in the mornings naked, on an empty stomach and after taking a piss I weigh 4.6lbs more now than I did before insulin... and I can see it. lol

Gaining fat fast on humalog