Yes it is possible. My blood tests rarely reflect my flare ups. It is common. Go by what your body is telling you. There are many things that blood tests can not detect. Your doc should explain that and take your symptoms seriously. I have learned not to question myself too much and just trust what I am feeling. I hope you are feeling better! Have a peaceful week!

Deborah- thanks so much for your answer! I really don't have too much trust in my rheumotolist yet.