I've been doing really well with my anxiety for the last few months, not letting it get me down and get in the way of work and social life. However, this week I've been getting really bad back and neck pain and stiffness and I can just feel my heart beating all the time. I also have just been feeling on edge a lot. It's  starting to wear me down and I can feel myself slipping into my old ways, starting to worry that's I've got something seriously wrong with my health and I just can't stop thinking about it.