likely because you're over arching your back when you come forward.
but, lets back up a step.
as baby grows, we know that the back will curve a bit more to support thr weight, etc. but, what is common when people lean forward is to stick their butts back and stick their chests out and forward. this creates more of a curve than normal.
instead of this, draw your rib cage in a bit (back toward the back of the chair) as you lean forward. draw your head away from your shoulders, your shoulders down the back and then draw your hips toward the chair. you should feel your mid and lower back 'lengthen and open' rather than feeling more curvy.
this still provides the hammock, without the crunching of the lower back which leads to pain.
but, lets back up a step.
as baby grows, we know that the back will curve a bit more to support thr weight, etc. but, what is common when people lean forward is to stick their butts back and stick their chests out and forward. this creates more of a curve than normal.
instead of this, draw your rib cage in a bit (back toward the back of the chair) as you lean forward. draw your head away from your shoulders, your shoulders down the back and then draw your hips toward the chair. you should feel your mid and lower back 'lengthen and open' rather than feeling more curvy.
this still provides the hammock, without the crunching of the lower back which leads to pain.