Labor?

Im 38 weeks today... since 3 am I have been having mild cramps like a period, and also in my lower back . An hour ago I started feeling them a little bit more painful (2/10) and the pain last for like 15-20 seconds and then it’s done... and it’s like that like every 15 minutes... my pelvic hurt tho when I walk... I feel soo different. Do you think is the beginning of labor or maybe is just Braxton Hicks?

This is my second child.