Is it ok not to show up till so long?

I am 14 weeks (and 6 days) pregnant now. This is my first pregnancy and my height is 5" 4 inches and my weight is 140 pounds (same as my pre-pregnancy weight). I have started eating better since the nausea is going away but I am concerned about not showing up at all. I wear the same clothes and look as before. Is it normal not to show at all till your 15th week? My doctor's appointment is 3 weeks far and I cannot wait that long in anticipation. Please help me.