What is the most painful thing you have gone through in parenthood?

Actually it was my breastfeeding journey for my first child. I experienced a lot of pain as I have frequent blocked ducts and had a mastitis. My family members especially my husband asked me to give up breastfeeding seeing me in so much pain. I am glad that I persisted and managed to breastfeed her until she is 2.5 years old which I never thought I can do it for so long. With the no.1 breastfeeding experiences, the subsequent breastfeeding journey is quite hands-on for me.