My eldest daughter has two teeth by the time she was 4 weeks and a complete full set by 10mths, and her two yr molars came though at 14mths...
We were told is very uncommon but does happen...

Cold flannels or slightly froozen ones help. as did sm33

I will add she did then go on to lose her teeth sooner then most, she is now 6 and has lost 8 teeth already her 1st being lost at 4.