Pregnant at work

I'm 9 weeks pregnant and I work at a coffee shop. My boss is requiring I get a doctor's note , mostly because I mentioned I shouldn't be lifting heavy things nor working with bleach (which we're not supposed to have at the store). My boss has me only at 3 days now and 2 of those 3 days are closings, and those closings require lots of chemical usage. He's notorious for being unreasonable and won't compromise with schedule specifications. I can't get maternity leave until I've worked at the store for a year. Which will be in October. My question is, should I attempt my doctor's note and risk only getting 1-2 days a week or should I just look for something else?

Edit: I've tried my hardest to continue to make this job with. Yesterday at my doctor's appointment they told me I'm +4 ketones and it's basically mandatory for health's sake to start taking nausea medication. I throw up at work, deal with 2-4 day long headaches at work, the smell of coffee constantly makes me nauseous and that's only during my pregnancy.