I quit fake sugar and it's been hell. Any horror stories to share?

Three days ago I decided to quit my last vice: Diet Dr. Pepper.
I was drinking an ungodly amount everyday and decided it wasn’t helping me one bit to get healthy. And the more I read, the more I realized I was right.
The first 2 days were HELL. I had a headache that wouldn’t go away, I was so irritable and couldn’t concentrate, and I went to bed by 6:30 pm.
I realized that was from caffeine withdrawl, so it’s been better today after I had some black coffee.
I’m interested to hear any weight loss/headache/killing spree stories from you jellies when you quit the sweet nectar of life! Misery loves company!