diaper rash

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I started work 1.5 weeks ago. My daughter is in daycare and with my step mom.  On Monday my daughter had a bad rash and I thought it went away. This morning I looked and it almost looks like a yeast rash in her butt crack.   My husband is so upset and wants me to quit work and take care of our daughter.   He never says his feelings are hurt and he told me today that it hurts his feelings.  My mom helped me get a job so I feel bad but I don't want problems in my marriage.