Any length of time you go without self injury is a big deal. It matters. Even if no one on earth ever "cares", it still matters.

I know how bad mood swings can be, but self injuring over it wouldn't fix the problem. Sure, it'd distract you for awhile & make you feel better temporarily... but then you'd return to your previous state, only with added physical injury & possibly related feelings of regret/guilt/shame that seems to plague most self injurers after they do it.

Be safe.