Sofa, have you checked your blood pressure lately? If you're up to 252 all of a suden and you were in the 220's not all that long ago the increased weight could cause an increase in blood pressure, test can also increase blood pressure, and the water retention from test can also cause water retention and increased blood pressure, as can a change from a healthy cutting diet to a shitty bulking one. All of these can lead to shortness of breath.
It might be as simple as this, or it could be something more serious. If I were you, I'd go for a physical and just ask for the routine blood work, lipid profile, blood chemistry, EKG, stress test, etc for peace of mind. Good luck, and personally, I have a feeling once you cycle off and drop some excess water you will feel much better.