I took 480 mg of Adderall and survived

I feel like I shouldn't have survived. I took so many pills. I felt like I should have died. I was in so much pain. I was treated like an animal when I woke up. The nurses were so mean. On the way home my mother said, "I really thought you were going to die. I didn't think I was going to take my baby girl home again." This was almost 7 months ago. My mother refused to get me help, when I couldn't sleep. I had nightmares, flashbacks, and I couldn't and still can't look at doctors.

Should I have survived this experience?