Honestly I don't feel well

Honestly I don't feel well today and would rather not work the 10hours I do on every Saturday. I am exhausted, nauseated, and overall moody. Yesterday I worked 10hours and made $9... Just $9.... And the day before I only made $9. I also almost went off on my boss. Pregnancy hormones are seriously getting to me. Hubby recommended that I take a personal day off. I don't even know what to say to my boss. The fact that my check will be less than $100 doesn't phase her one bit, or the fact that I don't feel well. She'd rather me vomit on a customer than me not be there. I have got to find a new job...