Baby only on one side of my belly?

Dalila • My 1st born baby girl is 4 year old & second baby on the way. We excited 😃😄

So am guessing as though my baby is growing on the left side of my belly only.  When I lay on my left side it bother me so I have to sleep or lay on the right side. When I stand up, I guess it all move to the middle because I don't notice or feel it. I would feel more stretching type pains on the left side than on my right.

Anyone going through this same thing?  Or had it happen in a previous pregnancy?