i would like a diagnosis or possible reasons as to why i use to sleepwalk

This is pretty off the wall, but have you considered leaving a light on, or getting a night light?

My niece had the same trouble. But my sis used a cooling mat around her bed. When she drop her feet on the ground due to the cold of the mat she wake up. But for the breathing problems I think you need to ask from the doctor about that.

Sounds like it, Zeurich. On the other hand, the breathing problem just might be a symptom of a panic attack. Pretty hard to know from a distance.