Weight after and during pregnancy

Bethania

I was wondering. Since I just found out I am pregnant with my second baby. I was wondering if your body still grows? With my daughter I went from a size 0 to 3 jeans (small to medium) but my breast didn’t increase that much. Will a second baby change anything? Also what can I do after labor to get my body tone and a small waist again before I was pregnant and can I still tone my body while pregnant?