Possibly related tidbit - I used to roll my own cigarettes when working in the field as a geologist, left a pack of papers under the seat of my truck which had no carpeting, spilled 100% DEET on the floor, DEET absorbed into pack of papers. Months later found those same papers (what luck!) and rolled a cigarette without thinking about it, minutes later I was asking my now wife if she "could hear the helicopter sounds…
On sligthly unrelated and personal note, I made the mistake to pass an MRI with gadolinium based contrast (refuse it if you have choice!) months ago and the lasting effects are still a huge toll on my health (difficulties to think, talk and sleep, skin and paint raidiness, cardiac and sexual (erectile and nearly no spermatogenese, maybe linked to thyroïd?) issues. I hope this isn't permanent but there is no improvement in sigth, and no explaination for why it wasn't filtered (creatinine level from a blood test months after the incident was on the lower end but still in the normals brackets) that could accord me support from a nephrologist or other specialist to get rid of the deposits.