When our little boy started teething (at about 10 months), it was his bottom teeth that came first. He too was fussy, drooling, runny nose and feverish. It was really hard for us to tell for sure if it was teething with his first tooth, probably that way for a lot of first time moms. But when his second (and then top 4 all at once) came in, it was easier to know the signs, which are all the ones you mentioned. In addition to those, his gums really would get red and swollen where the next tooth would be appearing. If you would push on the gums, they would feel squishy, due to swelling. And just like when you "fist" your hand, your knuckles get white, his gums would have a little white spot where the tooth would be coming in. Hope that helps you out.