I get a sharp pain in my head when i stand/bend over/move quick, also have an earache, stuffy&runny nose, cough, my throat hurts. whats wrong?

Otitis with effusion: You probably have enough fluid build-up behind the eardrum from the ear infection to cause a loss of balance, or disequilibrium. Suggest you start antibiotics and an antihistamine to dry up the middle ear effusion

R/O SINUSITIS : R/O SINUSITIS: Yes you should rest irrigate sinuses with saline/take a nasal spray like Nasonex (mometasone) and finish a 2-3week course of antibiotics ie bactrim/augmentin /cipro. avoid abrupt changes in pressure. Ie flying/scuba/swimming if diving or snorkeling is undertaken. These activities may increase risk of worsening sinusitis and potentially rupturing ear drum.