Cough with no other symptoms....could this still be viral?

I started coughing a few days ago. I think its getting worse. I don't have any other real symptoms besides a headache. I am not coughing anything up except a bit of clear mucus. It's worse at night. I just feel its uncommon to have a cough without having a cold first! I'm 25 and never had any allergies or asthma. Could this be viral??

Half my village seem to have a cough at the moment with no cold.

a village! Where do you live?

UK by the Thames.