Hello and welcome

You are not weak for having a trauma! Things that are happening in live affects us.

For me your story sounds like trauma, but even if it's not: it affects you to an extend where you cannot function anymore so I'll say it definitely qualifies for counceling.

Maybe some encouragement: I have this too. I get very anxious when people yell, for whatever reason they do it. But after a while of therapy this went from full blown panic attack to just anxious.

You are allowed to take your needs serious and get (professional) help if you are having difficulties achieving this on your own. And the short parts about your childhood that you talked about sounds like a lot to deal with!

Good luck