okay a bit worried my so says its nothing but I'm not sure. I've got the massive pressure in my abdomen and pelvis area.…

okay a bit worried my so says its nothing but I'm not sure. I've got the massive pressure in my abdomen and pelvis area. I'm not pregnant but not due to do another test for 6 more days.... should I worry? is this some kind of early pregnancy symptom. never been pregnant before and never actively tried to conceive before now so totally not sure if I should worry about this pressure thats building up or what I should do. and my belly is getting rounder and harder too and noticed that about when the pressure started... help please one confused woman!