R.S.
Teeth can come at any time. I know someone whose baby was born with a tooth. I also have a friend whose 2-month old son got his first tooth on top. My daughter is also adopted and we got her at a week old. She never got her first tooth till 12 1/2 months old! It came in on top. That same week she got two more teeth, one on bottom and the 2nd one on top. So, although it is more common to come in on bottom first, they can come in top first, and they can come at anytime. My daughter got bad with drooling at 4 months, but it would be 8 months later till she got a tooth! If you see whitish, though, its more than likely coming soon, but still could be a few more weeks.