Bad cough.

[Milarz]

Not Hayfever lol. Being sick whatever it is, always gets worse in the morning and night. Laying down and coughing more is natural. Because when your laying down, you have stuff pushing against your lungs more.

[cocaine]

I've had exactly this since I got back from Kavos - clearing up now though.

oh my god, tell me about it! my cold from kavos is still here, and i came back on the 12th july

[Eric]

Whooping cough ? Cold ? It could be anything.

[Circadia]

My friend has this as well her doctor told her it was a chest infection but go to a doctor to see what is up with you.

[GirlNextDoor15]

I have problems like that too but not really violent cough, imo.
If I were you, I would see the doctor for some opinions.