Suggest Treatment For Stiffness In The Body

Gender: female Age: 24 Height: 1.72m Weight: 87kg Health issues: severe iron- & vit.B12-deficiencies; asthma. Symptoms:Very stiff back (sometimes painful), shoulders & neck (knot at on the right, @ the base of the skull); as well as constant light-headedness. I also have difficulty concentrating.Notes: I'm not making any progress on my Masters thesis, but am also worried about current unemployment etc; I'm asthmatic, overweight & extremely unfit.What I've tried: I've joined a gym, to try & relieve some of the stress, up the fitness levels & lose the extra weight. It seems to be working at times, but I'm worried there's something else the matter.Question: I'm reluctant to see a doctor about this. Should I see a physiotherapist instead, to work on the tense muscles etc?