My son how to regression that lasted a couple of days and what worked for us was just taking a reset and going back to the basics which was constantly asking / reminding him tell me when he needed to go potty and then whether he needed to or not I was taking him to the bathroom every hour and a half just so that he never had the opportunity to be wet We did that for about a day or two and then he was back to no accidents
Thank you both for the thoughtful responses 🙏
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My now 5 year old had a regression when my now 2 year old was born. Not as major as what you're experiencing, but it does happen. Some things that helped: 1. Staying in underwear and dealing with the mess. I even had her help clean up. I would even say "oh no, what do we do when we make a mess? We clean it up." No big reaction, just deal with it and move on. Followed by a reminder that pee goes in the potty. 2. 10 minutes miracle. Special 10 minutes of mommy-big sister time of child led play as often as possible. 2-3 times per week. 3. Having her be my helper with the baby. 4. Babywearing and practicing one nap a day in the crib for the newborn so big sister can get snuggles too. Be consistent with the potty and big sister expectations and it will get better. Be patient. Give yourself grace. It's just a season.