I have had a cold for 14 days, still blowing my nose. today my head is stuffy and my ears are popping. what over-the-counter medicine can i take?

Not unusual: Unfortunately for some, a cold symptom may last 2-3 wks. If you are not having fever, no sinus/facial pain/headache (signs of sinus ifections etc), you probably be ok with some otc combo meds (antihistamine+decongestant)/advil-cold-sinus etc...Afrin (oxymetazoline) spray may very quite effective, but no more than 3-5 days of use. If symptoms worsen, consult doc.. Good luck.

OTC cold medicines: Probably the most useful otc product for your symptoms (presuming you have tried the usual decongestants such as claritin, claritin-d, or sudafed) is a 12-hour nasal spray like afrin or neosynephrine. These are very potent nasal decongestants. The only caution is that they are not to be used for more than 3 days, but after that time usual decongestants should work again.