I hope, by the time you read this, that you are feeling better. Fibro can bring you to your knees. I find that if I take pain meds before I get really bad, they work better. I don't wait until my pain is intense. If I do, then it takes a long time for the meds to kick in. Consequently, on my various trips to the bathroom at night I will take my meds and that helps me have a better morning. I still am stiff and have pain but it's not nearly as bad as it would be if I hadn't kept the medication in my system. You might talk to your doctor about that. I don't know what type of pain medication you take.
Welcome! I'm sorry to hear you are having such pain right now. This winter weather, can be so bad on us fibro's. I hope that your pain has past and you feel more comfortable.