Pregnant and caring for a 5,4 and 18 month old while pregnant!!

Im 10 weeks pregnant. And typically get very irritated during my pregnancys. I have a 5 year old . a 4 year old and a 18 month old! We have just moved from an small apartment to a very large house. The move has greatly impacted the kids and tantrums have started as well as straight out not listening because everything is new to them. How did you juggle everything ? Any tips?