When does the pregnancy glow start ?!

Taylor • I'm 17. I'm pregnant with my little boy! I'm engaged to the father. We've been together over two years. And can't wait to meet our little Prince(:
When does this whole "pregnancy glow" thing happen ?! I'm 12 weeks and I look like I got hit by a tuck every day. My face is dry an broken out my eyes are red and I hash dark circles under them I look terrible every day I wake up. I definitely do not have this "glow" you hear about.