I'm currently 25 weeks and for a few days have been having a lot of pressure in my lower region...aka vaginal area. My OB checked my cervix at 22w2d and it was firm and measuring 4.5 cm. I won't be getting my cervix checked again until next week (26w1d). Should I be concerned with the pressure? I have only had 1 other pregnancy that was a singleton and never had any problems whatsoever so every pain, twinge, cramp worries me. I was just curious if I should be concerned with pressure and if your cervix could change quickly or if it's normally a slow, gradual change.