Penis Shrinkage with no other issues?

Ok, I am new to being old...lol. I have read through these forums and those that appear to have an issue of this type talk about cancer, surgeries, and all of that type of stuff. I have never had this huge penis but you could at least notice it was there. I did go to the urologist for a little help since it just didn't work like it used to. He gave me the little yellow pill but I didn't really see much difference, it still worked most of the time like it had been. In the last year or so, it seems to have shrunk quite a bit. I think it would now qualify as a micro penis, where it never would have before. It actually now looks as though it is uncircumcised and I can't think of any other way to say it other than it seems to have just withdrawn inside. I take the lowest dose of blood pressure meds available and have for about 3 years now. I weigh roughly the same as I always did, I recently lost weight but don't see a difference. My exams and bloodwork always come back fine. Does it just get that much smaller with age? Honestly, I have to kind of push in and pull it out to even get it to come out to urinate. The urologist didn't look at it but just kind of shrugged me off when I mentioned it. He is a pretty highly rated doctor but didn't seem like he was either concerned or didn't believe me. You can google it but all the results I find are from the places that can add a foot to it and so forth, so I really can't get any honest information. Is there anything I can do or are those fun days over and I am just stuck with a micro now? I am not a nutcase and am truly serious, I can tell it is just nowhere near the size it used to be, which was only about 5 inches, but it was my 5 inches. I sometimes wish I had pictures of it from 4 or 5 years ago to compare to now so people don't think I am crazy. Thoughts?