It's hard to say without directly working with you, seeing exactly what doses and when you take your drugs. See exactly what your diet looks like and see your cardio and training program, plus pics would make a big difference, so that I can evaluate for myself, how much of it is fat and how much is fluid retention. It may be in your amount of cals from carbs and fat. Or the food may be fine but It may be in your food timing. It may be that the midsection is a trouble aren for you and one of the last spots that will come in, in shape.
There is also a chance that your abs are not strongly developed. Then thicker they are, the more they will show through, I would suggest working abs almost every day, in the high rep range, 20 reps. 4 sets hanging leg raises. Then 4 sets cable crunches for 20 reps. On each rep, pause and squeeze the muscle
Finally, some of what you're seeing may be water. Adding in adex or increasing the dose will help to dry you out more. Worst case, you could alays reduce the prop as well to dry out more. I would make this the last possible change.