Type 1, Vegan & Bulking (Low Fat/High Carb)

I was diagnosed with type 1 3 and a half years ago im 26 now and the doctors tell me in out of my honeymoon period and have been for some time. 15 weeks ago i started exercising daily 1 hour a day 6 days a week. The routine has really helped me get back into the habit of injecting after a long rebellious patch and though i have seen both dramatic strength and muscle gains (i was very skinny before) im struggling to find enough calories in the day! I have a low fat high carb diet to reduce my fat content and have minimal insulin resistance, the diet has dropped me from 1 unit of novorapid for ever 10g of carbs to 1 unit for every 30g so its working well for me so well im moving onto a pump because half a unit can drop my sugars by 3 units.

I guess I just wanted to know if anyone else struggles with calorie intake and actually building mass?