First of all, you did what you needed to do and I congratulate you for that. I was in this exact situation a few years ago, and let me tell you, it gets easier with time. I know schedule must be tight but do try to get profesional help to help you get pass this situation, also try to have close friends and family around you to ease the pain. Find a hobby so your mind doesn't succumb into the guilt.

Again, you did what you needed to do for yourself, anything your ex does is NOT your fault. I am proud of you.