I don't have particular people that trigger me, its more a situational thing for me.
I'm sorry that your mum made you feel this way
There is no way that you should be turning this on yourself though, you have done nothing wrong. An emotionally abusive relationship is not one that you should be living in or raising your son in! And like you said, you're paying rent etc....
Yes your mum may be going through a low but that doesn't automatically give her the right to put you down like that.
Massive hugs to you