Calling it now: she's either about to escalate to more serious forms of self-harm, OR she's gonna start leaning hard into the mental illness narrative.
The only way she can get what she wants (opiates, attention, someone to wipe her ass) is to present with objectively serious, unambiguous injuries. She's been flagged as a drug-seeking malingerer, so vague complaints like SPS attacks and MCAS rashes won't do it anymore. So if she wants opiates, she has to pick her legs off like Kelly, or munch her way into a port or trach that she can repeatedly infect.
My guess here is that Chelsea is a little too stupid to successfully talk her way into a port or trach (and because she's been widely identified as a malingerer/munchie, psych is really the only department that will work with her at this point) and that she doesn't actually want to feel real pain or be truly disabled...she just wants to appear sick enough to excuse herself from participating in life. That leaves fully embracing MuH MeNTaLz. The "special powers" is perhaps a form of her dipping her toe into this. It won't get her painkillers, but it could get her some nice runner-up benzos and most importantly, a continuing excuse to do nothing. If she burns through psych doctors (and that's hard to do, because there are lots of unscrupulous people working in mental health, and telehealth makes it easier to access a broader pool), I'm sure she'll find that routine suicide-baiting is a great way to keep the ass-wiping coming.
Honestly, people like Chelsea are why I think there should just be a minimum basic income for everyone. If Chelsea didn't need an "excuse" to drop out of adult life, she could just sit on her fat ass at home all day and be less of a drain on her family/society/the medical system. She technically should be employable, as an able-bodied, cognitively intact (kinda) person; but she isn't actually employable: her raging personality disorder(s) makes her dumb, lazy, and a nightmare to work with, and won't ever go away. Personality disorders should probably just be recognized as a legit reason for SSDI...imagine how much more functional your workplace would be if every cluster B asshole wasn't there anymore.