Hello girls! I have a question, it's 31 weeks pregnant now, for two da…

Hello girls! I have a question, it's 31 weeks pregnant now, for two days there is some discomfort in my belly, like a pain in my stomach but he doesn't really hurt ??‍♀️ a little dull pain in the lower back and on the sides, pains occur at night. There is movement of the baby, only this discomfort, I just want to lie down, I get tired right away. A 3rd screening next week, on 32nd week. I wanted to know from someone who had this? What complications can arise at this stage, who knows? I don't remember having such a hard time with my first pregnancy, it got harder towards the end of the 8th month