I'm so sorry.

If it helps, I know just how you feel. We have a 3 year old and a 6 month old, and I'm 5 week pregnant with a "surprise". (I would never call the blessing of a child an "Oops") We decided not to tell family until I'm closer to 12 weeks, but I ended up telling my mother since she'd been concerned about the 6 month old being fussy and not nursing well. Well, since now I understand why, I thought I'd go ahead and tell her. Her response was, "Was this planned?" and then, "I'm going to have to process this for a while."
i told her that we are very happy about this and I know people are going to be concerned about us and our ability to cope, mentally and financially, but I said in no uncertain terms that we're going to be fine and I don't want people grieving this pregnancy.
We're the only Catholics in our family, and most of them don't understand why we don't use birth control and don't get the concept of being "open to life". It makes things difficult a lot of the time.
So.....I feel your pain. Just know that all of us here are THRILLED that you're bringing a new life into this world!
