When did your baby get their first tooth?

My daughter slept through out the night at 2 months (8-10 hours). she always seemed like she was teething at around 3 months but she didn't actually get her first tooth until about a week ago and shes 6months, for the few days before she was up every hour at night, she had a fever and had diarrhea is was awful, I was like a walking zombie at work. it has gotten a little bit better this week but she is still up once or twice at night, shes not hungry her gums just hurt so I give her teething tablets. So my experience has not been fun so far I hope its not like this every time they cut teeth! good luck, how old is your baby?