Cramps that radiate all over my abdomen. I've had 2 about 13 mins apart that I have timed so far,…

Cramps that radiate all over my abdomen. I've had 2 about 13 mins apart that I have timed so far, but have been cramping on and off since about 8 last night. I have serious issues with my gallbladder so I've been warned to be on the look out for preterm labor signs by my doctor. Should I keep timing and see if they get any closer or am I really just looking at Braxton hicks? They don't last long about 30 to 45 seconds.