Have you tried allotting time for yourself when it comes to writing? Try asking a family member or babysitter to help with the child during certain days for a set time that is good for you.
Yes. My parents watch the kid two hours a day on most days. I have an editing contract I have to get through before I can get back to writing for myself. Some days, I don't have enough mental energy to edit. I open the document, stare at it, and close it because my brain is less than 80% there, and the author deserves more than that. She knows the situation, and I recommended submitting to other presses before I started working on it, but she didn't find one, and I liked it too much to say no, so yeah.