4 month old won't nap anymore

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My daughter used to be great with naps and had a good schedule but over the last week or so she fights naps. I am lucky if she has one 20 minute nap a day. She also only wants to be held. I have tried baby wearing but that hasn't worked either. This is just resulting in her getting over tired and screaming all day. She is still sleeping great at night, it is just the day time. Anyone have any tips to get her back to napping or know what would be causing this?