Lower abdominal cramping at 8 weeks

Elizabeth
Hey ladies I'm currently 8.4 weeks pregnant and this morning I woke up with mild cramping on my lower abdominal on the right side only.
Is this normal? And could it be that my uterus is expanding? I know that I will need to go to the doctors if it's painful or if I start to bleed.
The cramping/pain comes and goes...