I have recently, noticed that as I am getting aroused
Have you been examined for cardiovascular disease?
What you describe is a very common problem. It is important to be examined for cardiovascular disease, as this can increase the risk of erectile dysfunction. I suggest you see your general practitioner for blood tests (cholesterol, HbA1c, glucose) and blood pressure and ECG. In the meantime, try Cialis or some such.
Hope this helps. Please let me know if you have further questions.