My mom overdosed today

She was resuscitated from Narcan thank God. She has been clean from pills and hard drugs over a year. Well last night she got pills and that led to her buying heroin that was phetonal and my younger sister found her purple on the kitchen floor. My stepdad did CPR for a few minutes until emts arrived. She was foaming out the mouth and purple.lucky they got in the house through the allie and found her when they did. My sister Heaven who found her is 15, I 24, had my little sister 13 with me at the time but I ran out to the store. 13 yo called me hysterical saying myom OD. I rushed to the house , and they got her back alive. We have been dealing with my moms addiction since before we were born , it's always been scary to think she might die , but she never really hit hard drugs until 2 years ago , and she stopped for some time . Her tolerance isn't as high and now I'm feeling like maybe we will all have PTSD from this event. Any idea how we can get through this , my mom will not stop because she just replaces one thing for another and we cannot afford rehab. She has tried outpatient but no results. Now anytime we see her on drugs it's going to stab us in the gut and constant worry. What to do ..... how to live with an addict mom ...