I also slept on my back up until 30 weeks.

I'm 35 weeks and I sleep on both sides. I flip throughout the night.

I've never had the light headness that y'all have mentioned. . odd

left is best. right is okay. back is a no.

I am 24 weeks pregnant and sleep on my back sometimes I can't because I get light headed but depending on how the baby is positioned it doesn't bother me.

I wedge a pillow against my back when I lay on my right side that way I don't roll completely to my back in my sleep and it's pretty comfy

I still sleep on my right. Nothing else is comfortable

I'm 30 weeks and have slept on my left side but it's affecting my neck. I generally wake up on on my back. if I sleep on my right side I. completely out

I would avoid your back and if it's putting pressure on the main artery it will make you light headed.. I will be on my back for short periods of time but it quickly bothers me. I think either side is fine to be honest so your hips can get a break on each side. :)

Left side is best. Right side is ok. Back is uncomfortable for me to lay on unless I wedge a pillow under my back as well. but my left hip hurts pretty bad when sleeping as I sleep on that side so much!

I was very paranoid about this at first , but I think unless you did it every night, & every nap would be the only time it could actually affect anything. I say you're fine .. Just make sure YOU are comfortable.. Lil one is pretty protected