I feel so drained😭

(I’m not sure which group to post this on, so I’m really sorry if I’ve posted in the wrong one) I don’t know how to say this or put it all together, but quick background, I got pregnant at the start of the year, I was 11 weeks gone and unfortunately I miscarried, my boyfriends sister announced her pregnancy last week, she’s 4 months gone, and wow I feel it, I’m constantly upset, I feel so so drained. I’m just thinking this could of been me, I want to be happy for my boyfriends family but I’m not, I can’t be happy for them knowing this could of been me. Call me selfish.

They’re talking to me about names and today they went to go get a Moses basket, and some clothes and they shown me a video of the heartbeat, I broke down, I just don’t know how to cope with it all