You really shouldn't be feeding blood worms all the time. They are great for conditioning a fish for breeding but a steady diet of them will cause what you are seeing right now ... fat fish. I am sure they love 'em but it would be like us eating nothing but dessert for every meal. May taste good and we might love it but it wouldn't be a healthy diet.
Freeze dried food is not the best choice nutritionally for your fish. I would look into some good pellets as the staple and only feed the FD bloodworms as an occasional treat. You can look into frozen bloodworms or other foods if you like feeding that type of food as a treat as well. They are better than freeze dried.
I have some fish with bellies just like that. My bigger one, Thor, has quite the little curve but its been like that her whole life with me. I feed mine a very small pinch of flakes a few times a day, so I don't know if it's over feeding. But I think your fish is fine. Maybe don't chill on the food for a bit and see what happens?