I recently lost about 35 pounds. My breasts went from DD to C. If I regain some weight, will they increase to about a D cup?

I am 25 years old, and always a D cup. As I gained weight, my cup size increased from a D to DD. As I lost weight, my cup size decreased from a DD to a D cup. I was a D cup throughout my weight loss. Recently, I lost about 5 pounds (bringing my total weight loss to 35lbs). The last 5lbs. lost brought me to a C cup. My breasts are not necessarily sagging, but I noticed that they are not as perky and I have some stretch marks. If I regain 5-8 pounds, will my breast size increase to a D cup?