I'm with the other moms on this, except for one caution...
Right now, early in your pregnancy, your baby is just fine.
IF you are kicked or hit late in the pregnancy, and IF at that same moment there is anything else that might tend you into preterm labor, there is the POSSIBILITY that a traumatic SHARP type of bump to your abdomen could threaten preterm labor. It did happen to me when I was at 28 weeks with my first, and doing after school day care, and got kicked by a 5 year old who was having a tantrum. The baby had just had a major shift in position, the kick was against an area that already felt "tight", and possibly some other things were going on. I began some contractions that night...but we stopped it early, and my baby was born at term.
So, while you can, I'm with the mom below who says NOW is the time to train your little girl to be more gentle with Mommy. It's good practice for when baby comes, because you will have your hands full then.