Final hours before induction

Going in tomorrow to finally meet my baby girl. I just wanted a chill night with my 2 older kids and have a good dinner before we drop them off at grandmas tonight. Both kids are fighting, screaming, not listening to anything and tears over everything. I know a new baby makes kids regress but she ain't even here yet and they be acting crazy!!! I feel so bad after yelling at my 7 yr old. She was being a little brat and I sent her to her room after breaking down asking why she couldn't just behave and let us have a good family dinner together. I'm sure she'll get over it but it still bugs me.