cant tell how long ive been clean for

hi!! im sure this isn't a very common thing but idk which of these instances i would count as the last time i self harmed. i had a true relapse about a year and a half ago. i was very depressed and purposely harmed myself and was fully aware of what i was dong. i called this the last time i had self harmed for a while which meant i was a year and a half clean. however, a few months after this i got angry and scratched my neck. i cant decide whether i would count this as self harm to me since it wasn't fully intentional and i didn't have the mindset as i did the many many other times i self harmed (i.e., i had an urge to cut and couldn't fight it) this was more impulsive and honestly sort of accidental. if this is the last time i self harmed then im actually a year clean as of yesterday!! anyone able to help me out this is bothering me