On a journey to self discovery

I am finally free from a 9 year abusvie marriage.  I had to move on side of my parents in a one bed/one bath camper with my son.  I know they mean well and I do appreciate everything they do but it gets on my nerves when they call my stbx fag daddy to my son.  Its already my parents fault that my son knows everything about his father because they were fighting one day outside on the carport.  My son heard everything.  My son blew up at my mom tonight in anger because my mom called him dick head daddy dumass.  My son is going through so much confusing anger my parents do not understand that is the way my stbx is.  I can not change him in any way.  That is what he chooses to do.  I had to go intervene because my dad was going to beat his ass beacause he is hurt and angry.  Instead of doing what they said not calling hin names etc they continue to do it in front and to my poor 11 year old.  I am still living in a controlling enviroment at times.  I really do stay to myself alot because I am tired of fighting.  I hate living here on the side of them.  I can not do anything right and I get blamed for everything wrong in my life.  I try and realize that they are old and that they can not help the way they are but its hard sometimes especially when Iam used to being on my own,  I wonder how I could actually live on 800 a month or if it would be possible that way I can not work at walmart and be there for my son all the time.  I need him just like he needs me.  Please pray for me