Nauseous with a screaming toddler

Any SAHM mamas out there on pregnancy #2 or more? How do you handle the exhaustion and nausea all day with a wild 2 year old jumping all over you all day long. All I want to do is sleep and eat an occasional cracker to keep the nausea at bay. But obviously that’s not an option. Also to make matters worse we’re potty training right now and I feel like she’s regressed because I’ve gotten lazy.