Could I have dilated anymore?

Last week, I was having pains and my doctor checked and I was 3 cm dilated. Since last night, I’ve been having contractions from my uterus and back. Also been having hip pain since I woke up this morning. Is it possible that I may have dilated more? I go tomorrow for an NST and I’m not sure if they will check me again. Should I let them know about the pains?