Help! 10wks pregnant & sprained back

I’m 10wks pregnant and I sprained my back 😭 I went to the chiropractor which my OB said was okay as long as I made them aware of my pregnancy. On a side note a friend told me it was dangerous and I could hurt my baby by seeing a chiropractor this early?!? Anyways the chiro made some adjustments told me my lower back was extremely swollen and sprained. I find sleeping on my belly is the only way to get any relief while trying to sleep.. my question is I’m on the heavier side I’m by no means a twig.. how safe is it sleeping on my belly? I don’t want to hurt the baby.. my emotions are all over the place right now with what’s okay and what isn’t. Just looking for some friendly advice!