Hello frekkles and big hugs.
I don't think your housemate picked a good moment, do you? I think she's far too worried about being told at a particular time, and not sufficiently understanding about what it's like to have a baby, or she wouldn't have had a go. You did nothing wrong in taking a bit of time to work up the courage to tell them all. Your problem is a lot bigger than hers, and she would do well to remember that in future.
Do you know, she might even be jealous in her heart of hearts. People are funny like that.
Nutty is right about the sunshine thing and it will all be OK, really.
If you're not getting the support you need from your housemates, a Housing Association might be able to do something for you, but perhaps once the dust has settled things will improve.
We are all here for you xx