Pregnancy - Second Trimester

I can’t figure out whether your stomach is supposed to, naturally feel bruisy when you touch it when you are pregnant. Is it stretching so much that the skin hurts? I am just one of those silly worry-wart first time pregnant women, I guess. It doesn’t feel crampy, my stomach just feels achy. Good ole Mom (the one I always go to with my worry-wart issues) says that it is probably the skin stretching and not to worry, but that if it makes me feel better – some moms even go in to get ultrasounds when they feel those aches.