she wasn’t repentant
That's really the key. I mean, you could murder someone on a Monday, and by Wednesday, you could conceivably truly understand the sin you committed. You could repent. You could change your life. God forgives those who truly repent.
Kill yourself on a Monday? You don't get a chance to repent. It's over. God judges based on what you did and what you didn't do. And one thing you didn't do was repent. Not good for your soul.