High tolerance to pain

Ladies,I am 38 weeks and 2 days and I am constantly having back pain radiating towards my stomach for a few hours now. They are not lasting as long but happening every few minutes. I have a decent tolerance to pain and this is my second pregnancy but I was induced the last time. So I didn't really experience any early labor symptoms. However, I am kind of freaking out now cause what if I am experiencing early symptoms now and not realizing it cause of my pain tolerance. Oh and I am also losing bits of my mucous plug. What should I do? ****UPDATE**** First I would like to say thank you to the ladies that commented. So, I decided to call my doctor and he wanted me to come by just in case since I am so close to my due date. They monitored my contractions for about an hour and half and they are getting more consistent but I am only 2 and half cm dilated 😒😒 So I came back home. However, the nurse was pretty confident that she will see me back in a few hours. So I am hoping she is right! Fingers crossed 🤞