When even something as simple as a spontaneous purchase can cause one to go into a stomach fit of butterflies and slightly shaking fingertips. (What the hell?)
You're also this INFJ if said "excitement" has survived A) Thinking about treating myself and B) Succeeding in doing so but is fast decimating into a bundle of possibilities of what could possibly go wrong.
Hence, you're an INFJ if online purchases, much like going off on your own to make a purchase in a store that deals with these things: A) Money B) Interaction and C) Technology makes you anxious.
Again, what the hell?
Pleasure is pain for us, friends.