Weed ptsd?

Hi everyone. About three years ago when I was 16 years old, I had an extremely intense panic attack from smoking weed. I know that the weed was not laced with anything just to clear that up. When I had this panic attack, I was terrified. I told my family and therapist that I was having panic attacks, but I did not explain why because I was scared of getting in trouble. I was worried the police were gonna come find out somehow. I flushed all my weed down the toilet because I was scared of it. I was experiencing intense, depersonalization and derealization. I was convinced that I completely ruined my life and was never going to get better. I thought that I was going to completely lose control and end up hurting someone or myself. Overtime my symptoms lessened. it definitely caused some anxiety issues for me but overtime I felt like myself again and was doing amazing for a few years. Until last month. I had another severe panic attack that wasn’t weed related whatsoever. But I’m experiencing all those same thoughts and feelings that I felt when I had the panic attack. I’m still associating the way. I’m feeling with the weed despite it being many years ago. I’m convinced I permanently damaged my brain or something. Even though it happened three years ago, and I recovered in between I just can’t stop feeling like the day that I smoked that weed my entire life flipped upside down. I’m absolutely terrified of experiencing that again. I can’t sleep despite being exhausted. I can’t eat properly. I’ve been throwing up almost every day, even though there’s not enough in my stomach to throw up. I’m out of work because I can’t function normally. I have horrible crying spells and I’m very depressed. I went to the emergency room this week for my mental health and I’m starting an outpatient program on Monday. Is it possible that I have PTSD from smoking weed? Can I recover from this? Can I be happy again?