You can get a pregnancy belt if it's just from a heavy baby. I get this feeling and it's when my son is sitting really low. I gently push up at the bottom of my belly and he shifts and I feel better.
I am not feeling this way as much this pregnancy (I'm 29 weeks with my second) however when I was pregnant with my son... I had this feeling alot. I would joke it was like the hammer of thor crushing me. My son came out being pretty big 8 ibs 9 oz born on his due date (thankfully ) it hurts but it actually good because it's preparing you and the baby for the D Day.
Yes I def feel this way at times, and it's not all the time it's here and there. I told my oB it wasn't normal, she sent me to perinatal and I was told its bc I have placenta previa. First few times I told her she blamed a heavy baby hehehe
I get this feeling when my baby boy is going through a growth spurt. Since he has been getting heavier, I get have felt it more often. I think it's just from stretching and a heavy baby in there!
+++++I'm nearly 30 weeks as well+++++