Recently relapsed after 5 years and regret my actions and don’t know how to tell anyone

I (23F) was introduced to drugs and abusing substances at a young age through my parents and siblings. Growing up my father used a lot of drugs (Heroin, Coke, Weed, Nicotine) and possibly more that I might not know about. While my mother would drink an insane amount of alcohol and used nicotine as well until she quit. Once I hit the age of 11/12 I started paying more attention and my dad had his first overdose in front of me. At the time my brother who was also using with my father handled the situation but I was unaware he was also high. After about 2/3 years I started stealing packs of cigarettes from my parents because before my mom quite they would buy about 5/6 packs, and my father would never notice one of his being missing because she bought them and he’d be high. After smoking cigarettes for about a year I then started smoking weed/dabs with basically all of my friend groups. I have a poor memory of my high school time but at some point I was introduced to Cocaine and started doing that a lot which led to a lot more drug and alcohol abuse down the line. I finally quit around 19 and had been sober for about 5 years now until recently. I don’t really know why I did it but I was offered cocaine about 4 months and decided to do it. Since then I’ve done it about 4/5 times and I can tell it’s becoming a problem. I’m afraid to reach out for help as I am ashamed and regret my choices but I don’t know if it’s possible to get sober without telling anyone.