Have you ever had scabies before? If you haven't, the incubation period is anywhere from 2-6 months. That means you won't see symptoms for that long.
If you've had scabies before, it would be much sooner - 1-4 days.
However, you don't mention a rash or blisters or any bumps at all, and with scabies, you'd definitely have some kind of rash.
My guess is that you're allergic to the oil, or just really sensitive to it. If you can safely take Benedryl, try that and see if it helps. It will make you drowsy, so take it when you can sleep, won't be driving a car, won't be drinking alcohol, etc.