Bloody mucus every time i blow my nose.. i had a bad cold since then the mucus never stops. and pain on right side of my head and neck.

See your doc: It may be that you just have significant irritation/inflammation of your nasal passages/sinuses from noninfectious inflammation but it's also possible that you have a more concerning bacterial sinusitis that may require antibiotic therapy. At least consider, in the intermin, nasal saline irrigation several times a day .. it's a start. But boil your water prior to use(and let cool) to sterile.