Lump In Pelvis

I have a lump in my pelvis that was never there before.  It doesn't hurt just feels hard.  I can feel my pulse in it as well.  
Is this baby? I'm only 15 weeks so baby is the size of an apple.... Is he or she large enough that I could notice this? 
The lump is pretty low down about an inch above the hairline is the full lump and maybe a little below.  I would get my doppler but I'm too lazy to get out of bed right now.