Yes unfortunately steroids are notorious for raising blood sugars even in someone without diabetes- they can also give you a massive appetite and cravings - hubby is just coming to the end of a 3 month course and he has gained weight even though he’s been very careful with his diet (he’s not diabetic but usually eats low carb to keto as it helps his colloid colitis for which he’s just had the steroids for after a flare up)
Hopefully now you’ve finished your course your numbers will start to come back down and you’ll feel better