I think a baby at any age is a blessing, but I know that if I were to find out I were pregnant now (I'm 45), I'm sure I'd be an emotional roller coaster for quite a while. I KNOW I wouldn't have the energy for the physical demands that I had when I was younger, but I also think I'd probably be more patient with a little one now than I was with my babies when I was in my 20s.
Your question made me think about a couple of things. My dad was 40 when I was born. He also had chronic health issues all of his life, and he was dead by the time he was 61. No! I'm not scaring you! Read on. At his funeral so many people said strange things to me like, "You are so young to lose your father," and "It's a shame your parents were so old when they had you." (My mom was 32 when I was born. NOT such a big deal!) I even heard someone say, "They shouldn't have had children so late. This is what happens." Well, you know what? My dad was the most patient, gentle, wonderful man! I wouldn't have traded 21 years with him for 70 years with any other father! But, yes, it surely would have been wonderful to have him around as a younger grandfather for my children. I'm 45 and my children are just starting to move out of the house. If they have children in their 20's, I could very well be a grandmother in my late 40's, early 50's, and I think that will be wonderful, too! My grandmother was 20 when she had my mother, and so I had my grandmother in my life until just a few years ago when she died at the age of 96. What a blessing it is to have a grandmother into your 40's! So, I really think there are blessings having children at any age.
Still, there is one more thing that I'm thinking about. My cousin had her first baby at the age of 43. She had been married for 17 years at the time and for all of those years, she and her husband were very vocal about never wanting to have any children. But then her beloved mother died. My cousin was very, very close to her mother. When she lost her mom, all of the sudden she had a very strong desire to have a child. She knows that there was an element of grief involved in her decision, and having suffered your miscarriage recently, that is a very strong influence on you. (And I am so very sorry for your loss.) I don't know if that's right or wrong, but I can tell you that my cousin has never been happier! In her case, she says that since she had no other children, she had nothing to compare it, too. She also says that she's in great shape now from all the running around!
Like I said, you can find blessings in having children at any age! Please let us know how things turn out.