Is it bad to lay on my back during pregnancy?

At 15 weeks, it's not a big issue- unless you feel difficulty breathing.

what he get bigger, baby can compress some blood vessels which can be bad, they say to lay on your left side because it's the optimal spot

Yes not sure on,why I lay on my left side a lot n my right side

@mamalamadingdong, @williams15 @mommyof3tobe when should I quit laying on my back

I stopped after 17 weeks. your body will tell you to move. you'll feel nauseous, and dizzy, it's like alarm bells. @hayhayes1

talk to ur doctor I. still do it n 33 weeks