Here you have mention multiple issues and it can not be treated with out doing full evaluation. If you constantly have headache then need to check with neuro and may need to do MRI scan of brain, If you have short breathing problems along with chest pain specially on walking up or climbing stairs again you need to check with cardiac doctor and may need to go for tredmile test and electrocardiogram, If you have still pain on nasal area then it could be related to sinus and need to visit ENT doctor. If you have pain in neck and back then it can be related to spine and need to visit ortho and physio. I suggest to go for complete body check up and then based in report decide which doctor you should visit for what problem. Take care.