They most certainly could be! Especially if you have a posterior placenta. I know I first felt movements this pregnancy at 13weeks and 4 days - this baby is measuring ahead by about 5 days though... And this is my 11th pregnancy. However, with my others I didn't feel them this early. My first was around 16 weeks with a posterior placenta and my others were a little later with anterior placentas...

I would say those squidgy movements are your little one letting you know she/he is there!