Liam also slept on his tummy from about 3 weeks. I started out on his side, as he spit up all the time and ws scared he would choke, and then my mom babysat one night and put him on his tummy and he slept so well. He was always able to lift his head and turn it arouund.
As long as he is rolling over, Im sure its fine.
About blankets on the face, ds loves to have a blanket up on his cheek as well, now that he has a lovely, he always puts it on his face. Its a comfort thing I think, I to always sleep with the blankets on my cheek.
Hth
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