After having a sinus cold for like three days I noticed a single red dot on my neck- slightly raised, not itchy, doesn't hurt at all. The next day there were five. Now on day three I'm up to almost ten! What could they be? My glands are a little bit swollen, but no sore throat. Haven't switched detergents, bought a new neckalace, tried a new food- any of those things... Should I be worried?