Well she did post about being on X and needing BossHog to rescue her from some dudes house at 5 am a few weeks ago.
I’m 50/50 on the drugs. I have a feeling she’s had issues in the past with them and maybe her parents have made that one of their very firm boundaries - no drugs. I’ve know people who make a big production about being straight edge or anti-drug as a cover for their drug use. So while she might overshare everything she knows not to be open about drug use in case mom finds out.
Her parents will put up with issues and behaviors that’s due to her mental illness but maybe won’t let drug abuse be jet fuel added to the dumpster fire.
Abby tends to be slightly chubby so I’d look for dramatic weight loss or being quite thin as confirmation she’s using drugs. I’d also bet her psychiatrist gives her some type of benzo and/or ADD drugs so she might be able to abuse stuff legally prescribed to her too.
The average person starts behaving erratically if they abuse drugs but erratic behavior is Abby’s normal behavior. Abby putting on a demure blue dress, dying her hair a medium brown and getting a job at The Gap would be abnormal behavior for her. I think her maniac periods are what a meth binge is like for a normal person which is why it’s hard to tell the difference.