I have had a cough for several weeks now. i'm not sick or anything, just been constantly having to clear my throat. i do not smoke and eat v healthy?

See your doctor: A chest x-ray is usually a good idea for persistent cough, and its probably going to be normal. Three most common causes of the cough you describe are post-nasal drip, acid reflux, and asthma. Yours sounds like post-nasal drip. Over the counter decongestants can help if that is the case, but limit their use to a week or so. Sometimes an inhaled steroid helps, but this can take weeks to work.