I am turning 50 in December and honestly I cannot wrap my head around it because in my head I am still 40 or younger - It feels like the end of the world to me so I am really trying to get my head right. It is not that bad, even though I have always thought of it as ancient, but then I look at people I know that are 60 and 70 and still enjoying life to the fullest and I decide age is just a number and in my head the number is much lower...
I think that's the important thing is to be healthy and well and enjoy life. You have my sympathies though, I am only just over the half way mark to 50 and I am feeling the pain of getting over the hump!