Contraction or what?

Ask ko lang po mommies, 40 weeks npo kasi ako and supposedly due date ko today. I feel something intense tightening on my abdomen pero nawawala din naman when i change position. Halos every 10 mins kasi interval at masakit sya. Wla pa nman po akong kahit anong discharge or anything na lumalabas sa aking private part. Posible po bang labor contraction ito or braxton hicks lang? Salamat po sa sasagot by the way im a first time mom po