Oh poor thing! These things happen when you act absent-mindedly or overthinking. Maybe you should think less about your fiancé.
Burn myself regularly on wood/coal burning stove. Even a tiny split second touch on the fireclay gives "nice" blisters from burn (several hundred °C hot stone) It happens. Gradually I got used to it.
"Burn myself regularly on wood/coal burning stove" What?!? Even to a person with your manual skill? Then all my certainties collapse... By the way, I often scald my wrist with the pot when I drain pasta: so much so that a hieroglyph has almost formed on my wrist.