low lying placenta?

redhead0525

Yesterday I had a great ultrasound....tech deterrmined the sex (which we have sealed in an envelope) but most importantly my subchroionic hem was gone! It reabsorbed..phew what a relief....

at the end of the scan she did say.."ugh your placenta is pretty low...but for now we wont worry abt it" 

I was so absorbed in all the other news I never asked my OB abt it and she never mentioned it...should I be worried? Isnt everyone's placenta low at this stage? (15-16 weeks?)