I've had blue veins on my stomach since about week 20 and I'm also 30 weeks Friday. Don't sweat it, just stretching and lots of blood flow

I just noticed them on myself looking at myself tonight. Haha

yes. it's just the baby is pushing everything closer to your skin and your veins are either blue or red. you're fine. :)

I've had them for a while myself! On both sides of my belly.

I think yes. I am 21 weeks and am beginning to be able to see some of my veins through my belly. We have so much more blood in our bodies while being pregnant, I would be more surprised if I couldn't see them!