ive had a mucus thing going on in my chest ever since left the hospital after robotic hernia repair surgery where they place gas into your abdomen. I've had mucus coming out since. Now it's in my sinuses with mucus out of nose too n cough. After 4weeks after surgery my MD prescribed antibiotics which i've finished. Still have the headache and runny nose and feels like my heads in a tunnel. Pressure n pain in the head. Is this something I should be concern about? what do i have???