I had a similar encounter about a month ago. A friend of my DH asked where my two-month old was. It had been such a long time since I had to explain, I lost it.
Unfortunately, being women with a later loss, it's something we have to deal with. Our losses are more public than women who hadn't told anyone yet. It can be difficult to have to re-live everything, but we also get the advantage of having a larger support system during this difficult time.
I'm sorry you're having a bad day. Big ((hugs))