The longest continuous flare up I've had was about 10 days. But at that time, I knew it was about the stress at work. So try to see if the flare up has anything to do with some kind of stress or even the food you've been eating. I learned it the hard way that it was the food. As soon as I went glutten free and msg free, my flare ups were not too long. I still get bad flare ups but its now down to 2 to 3 days. And I also recommend you talk to your HR to see if they have anything to help you with your condition. Perhaps they can be flexible in your schedule when you are having flare ups.

It took me a long time to understand that pushing my self more and more made me worse i didn't want to let fibromyalgia affect my life but unfortunately it dose i am currently going threw interviews by my work because of my sickness but my doctor says things are worse now because they both fight agenst each other so am having to slow down i hope you can as well and dont feel bad for being of off you need to look after your well-being xxxx

You are doing amazing.
If your employer is flexible, keep doing what you are doing.
Maybe focus on what is triggering the flares. That can be a mystery sometimes, but look for repetition.
You have a good work ethic that you should be proud of. This is a situation that limits your options and at times is beyond your control. I think you are handling this very well.

Hi
I think everyone flare duration is different. My experience has been they got longer as i got older. And i went to.part time work .
Its so hard balancing how you feel...but you can only do what you can do. I ended up pacing my expectations as well as my body....it took time because like you i had a real strong work ethic.
Please try not to stress lovely...it will compound your pain.
Im here if you need to chat x

Thank you @Cameragalx💜