weaning guilt hitting me hard

my baby boy is 16 months old, going on 17 months early august. i accidentally got pregnant again so i've decided to end our breast feeding journey, but i am feeling so guilty. My heart is absolutely broken. he did wonderful last night, went to sleep with no boobs, no milk, no crying, just a sweet kiss and a movie and he was out in a few minutes. this nap just now was a whole other story.. he just cried and cried and cried to the point where he couldn't catch his breathe and wouldn't stop or accept his sippy with almond milk or anything. we just laid in bed together and i rubbed his back and played lullabies on my phone until he stopped crying because he fell asleep. he's still shuttering from crying every few minutes and it's killing me. i'm so worried he's going to hate me or be mad at me for doing this to him... i'm just laying here while he sleeps, silently crying basking in the guilt and i don't know what to do to make myself feel better. i was so proud last night but today it's hitting me like a ton of bricks.