i have been hypochondric since Age 16. but that usually came along with high irritability and after phases that i hadnt slept much for months and worked litteraly like a maniac. might have been Switches in episodes that back there no one noticed. by borderline delusional thinking you mean it is related to bpd or that it is on the borderline to delusional thinking? right now i do not get very hypochondric anymore but i have been able to produce symptoms of an illness i believed to have within minutes after reading up on them (and i still am, yesterday i got Kind of hypochondric because of the fighting, read up on inner bleedings and produced the adequate symptoms like dizziness within five minutes)