Am I squishing my baby?

I am 25w3d pregnant with baby #3 and I've never felt like this before. I am having a hard time bending over and sitting up with my back straight. I feel like I am squishing the baby because he gets really active and starts moving around until I get in a more comfortable position that allows him to have more room. I've read articles that say the baby is still able to do somersaults and move freely but I don't feel like he can. I can feel him from below my waist line and all the way up in my ribs at the same time so I don't know if i really believe he has that much room. I am a smaller  framed person and I had to have an emergency induction with my first because she didn't have enough room to grow. Should I be worried? Like I said this is the first time I've felt like this and I feel like I'm hurting him. Is anyone else experiencing the same thing?