Got told to "read the room"

And it genuinely hurt more than I thought it would? Like...I try but I just can't?? I just say things. I don't think usually, I say how I feel and what I feel and don't think ahead typically. I blurt things out and it hurts people sometimes and I don't mean to and then I feel so awful about it, and they react poorly but often they don't understand what I meant and now it's too late, my foot is in my mouth and everything is ruined. I've not read the room, someone is upset and I can't fix it and now I'm upset. I don't know how I can help people taking what I say the wrong way and reacting poorly to it. Is that not reading a room? I'm so confused and sad and idk.

Sigh