Throat irritation. But 3 weeks passed.

I have been suffering from watery mucuos which is I feel always stocked to throat and back nasal passage. Sometime I have stabbing pain on back of head, around ear, headache, nasal congestion, these are not long lasting. Sometime my eyes feel like burning that too for short time. so i visited ENT , he gave me ceftum 500. 2wice daily. I am 3rd day on my medication. Situation not improved. I still feel mucuos at back of throat, feel pain in chest and abdomen joint. Always feel sleepy and tired, but my eyes feel like I am awake for days. He prescribed lecit M for allergy and a nasal spray, which I have not started yet. as I feel too weak with these antibiotics. I have teeth identification marks on my tongue also. A fissure like gesture on tongue also. All these things happening at the same time. At first I thought it is because of season change. but 3 weeks passed.