Teething?

Kate's been having a rough time as of late. She caught her first cold (probably from the church nursery), and on top of that I think she might be teething. I'm really not sure if she is actually teething or if I'm just trying to ascribe a reason for her extra fussiness. She seems to have a love-hate relationship with the cold teether ring that I've given her, as well as the teether on her exersaucer. She chews on them voraciously and then gets really mad at the same time. Puzzling.