Hello everyone. I'm 24 weeks pregnant, just like with my first pregnan…

Hello everyone. I'm 24 weeks pregnant, just like with my first pregnancy, I have Braxton Hicks contractions and my belly is getting smaller, but here it's only in one point, on the right side below the pubic bone and very little that it gets smaller, it's very painful, doctors don't say what causes it, they just said that I have preterm labor and a short cervix, prescribed suppositories, but I don't know why it hurts so much and gets smaller. Has anyone ever experienced something like this?