Diagnosed BPD/depression/anxiety/unspecified trauma. BPD is quiet BPD, which in terms of this situation specifically makes everything worse cus I can't say shit and nobody knows shit

When I'm trying to make someone feel better, I fuck up and they feel worse. Even if I largely succeed sometimes and everything seems fine, I'll say something at the way end that'll make them feel like shit or piss them off again and everything is ruined. Or when I'll make some stupid mistake that'll fuck up everything, I almost lost my SO's greencard, passport, my wallet, etc. because of a dumb mistake I made for example.

Everything I do feels pointless and I feel completely powerless to do anything about anything because at the end of the day I will find some way to fuck it all up and ruin everything. This happens way too often and I'm sick of feeling like shit and making other people feel like shit because I'm apparently just cursed. How do I fix this, please help.