when do I have to stop!?

Heather • 💙Otto Wayne 9/7/18 💙💚Owen David 5/22/20💚
I'm mostly a back and sometimes side sleeper (never use to be until I rescued a kitten that sleeps on my head!) Iv heard that you not suppose to sleep on your back while pregnant? I'm in my 5th week, when do I have to stop for good?
 I'm trying to get use to side sleeping all the time but it's honestly hard! And also can I lay on my back while watching tv? Or is it just a no go all the time?
And here is my Eugene.... enjoy! 😻