How can I get my co worker to be more helpful?

Anonymous
I’m pregnant and I’m early along and I’ve miscarried before and I’m trying to be more careful.
I work at a dog groomers and have been able to not lift the dog and have them get up on their own. My issue is that my coworker doesn’t help with any of the cleaning and putting the heavy stuff away. It annoyed me before that he would only walk the dogs and sit in a chair as the dogs played and did that for a hr while I cleaned but now that I’m pregnant I’m getting physically ill from lugging all the stuff around and the smell of the chemicals we us to clean. Like even yesterday I keep having to leave to get sick and it took me 2 hours to finish all the cleaning and he sat with the dogs the whole time and we’re supposed to just walk each dog for a potty break and no dog should take longer then 5 minutes max and each and by the time we are supposed to start walking most of the dogs are gone or leaving. There use to be 3 of us and I we all had task we did and we split the work evenly but I’d still help both of them but since the other person quit he’s gotten super lazy.
He’s been lazy before by spending most of his time on his phone and in the bathroom to avoid having to do things but sheesh

How can I get him to help or even switch and every other day he cleans? My pregnancy is already rough but his been making it harder by not helping
How can I get my co worker to be more helpful?
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