Struggling with PTSD and Fear of Abandonment Due to Childhood Trauma

I was recently diagnosed with PTSD due to trauma in my childhood including witnessing and being a victim of domestic abuse, this was between my mom and dad. my dad being the abuser, because of this my parents argued a lot and me and my mom eventually moved away and lived with family for a while. I now have a fear of abandonment and feel like everyone I love will leave me at some point, I also feel like a burden and have a hard time expressing emotions and talking to people. I started therapy in 2016 and I got on medication. Things were rough sometimes but I had finally started feeling better recently. My parents had gotten back together after being separated for a while so I've lived with both my parents and my brother for about 12 years continuously. I finally felt like I had a stable home life or more stable than it once was. But today my dad told my mom that he won't be paying any bills anymore and basically told her that me and her need to get a job or find somewhere else to live. this wouldn't be a problem if we were able to work legally but we are undocumented, there are ways around this which we can figure out but now I'm terrified of having to possibly leave again and start over like so many other times and I can not go through that again. on top of that my dad said he is not filing taxes this year which means I will not be able to receive financial aid for college anymore after this upcoming school year. so I will possibly have to drop out of college to work at some place like McDonald's and also help my mom find a job. I'm just looking to see if anyone has ever been in a similar situation or has some words of encouragement or advice.