Hi, my name is Astragirl24! What benefits can I claim with fibromyalgia and arthritis?

Hi @Astragirl24 - & welcome to the community. If thinking about PIP, then this isn't based on any diagnoses, rather your functional ability to safely do, or not, some daily living &/or mobility activities. You can see what these activities/descriptors are here:

https://www.cambridgeshire.gov.uk/asset-library/personal-independence-payment-descriptors-and-scores-april-2023.pdf

You'll see there are points shown alongside these descriptors, & you'd need 8 or more points to get the standard rate, & 12 or more to get the enhanced rate of PIP for either/both of these components.

Depending on your circumstances, then there might be other benefits you could apply for, which you could check here:  https://benefits-calculator.turn2us.org.uk/survey/1/c3cdba64-9664-4bda-9cdd-d4e51165114