Sleeping on my tummy ok?

Su

I did a Google search for sleeping on my stomach but came up with multiple different views. I'm wondering if anyone has asked their doctor if it's OK to sleep on your stomach and if so for how long? I'm at tummy sleeper and have always been a tummy sleeper and I am still sleeping on my tummy at 17 weeks, but as I get bigger I'm wondering if I shouldn't anymore?