I Am 38 Weeks Pregnant Today, I've Been Having Lower

I am 38 weeks pregnant today, I've been having lower right abdoman, and right leg pains since about 3 or 4 this morning, the pain in my leg is constant, but the pain in my lower stomach only hurts when I am sitting or laying down, when I walk around it eases up just a little bit. I was 2 1/2 cm dilated on Monday, but have had no contractions at all, only occasional braxton Hicks. I am also having pains in my lower back. Could I be in labor?