Braxton hicks or prodromal labor ???

im 37w5d ftm

got a cervical check last week doctor said im

2cm/long/high/posterior/medium

been having what id call intense period cramps on my lower back and lower abdomen

painful (but tolerable i have high pain tolerance) and would last a while on and off but not consistent

these past few days ive been getting the period like back pain with the urge to use the bathroom to poop if u know what i mean

lost my mucus plug at 35 weeks and wiped white and a little of brownish discharge a few days ago

what does that mean