Braxton hicks shouldn't be painful, but can be uncomfortable. Is it painful or not? You said you had pain but then said it's not painful... maybe call and ask the doctor, every 15 seconds is a lot.
Sorry, yes there's pain but not major ..
I have painful Braxton Hicks so they can be somewhat painful. They can come on from too much activity or being dehydrated. Try drinking some water then laying down and resting. They should go away. If after a while they don't go away or they get more frequent call your doctor. Of course anytime you are concerned you should always call your doc no matter what folks on the internet say, lol.