I had cramps in the EXACT SAME SPOT as you! Don't worry. There are tons of crazy things going on inside you right now. Your uterus is growing, which causes a lot of cramping.
Because of the changes in your uterus and in your hormone levels, and because of any change in your diet and prenatal vitamins, your digestive system simply isn't working as efficiently as it used to. As such, expect a lot of cramping, bloating and some pain from gas pressure and constipation.
Don't panic unless you start bleeding. If, however, the pain becomes very, very severe, call your doctor or go to the hospital. Better to be safe than sorry; but don't stress. It sounds like you're going through all the normal woes.