Ugh, so you are female. Is this around the time in which you are about to begin your period? Could this be related to ovulation or period cramps? Or perhaps cysts? Having ovarian cysts can cause us to be irregular and have that symptom of dull type of pain. Have you had a physical or better yet, a pelvic exam with a gynecologist any time recently?
This sounds like me, I don’t get periods, have the pain when sneezing or coughing, sometimes laughing too hard or bending in a certain position. I’m 17 and I have PCOS which is polycystic ovarian syndrome, like the earlier answer said it may be ovarian cysts. I had blood work and some ultra sounds done. I’d definitely bring this up to your physican