I took castor oil i need to know if these symptoms are normal?

First off im 38 weeks and 5 days ima be 39 weeks on thursday april 7 I took Castor oil at 1015 pm and now its 408 am and I been getting braxton hicks contractions I believe I'm not sure what to call them I'm a first time mom but is this normal or should I go to the hospital already ?not sure what I should do honestly these bhc keep coming evey couple minutes it gets my stomach hard and feels like menstral period do I just wait to see if my water brakes or until I can't take the pain?Idk what to do can someone plz help me?