I don't think you should worry about this. Most doctors agree that once they start rolling around, there's not much you can do. And if she is rolling around well, she probably has a lot of neck strength - so if she did have trouble breathing, she would be able to lift her head off the bed by herself.
I might get some flack for this but it was what was told to me by my son's doctor when my son was around the same age.
Keep taking the precautions that you have control over as they say there is a risk of SIDs until they are a year old.
I lost a lot of sleep over this when it was my son. He refused to sleep on his back (and still does at 3 years) and I insisted he be on his back because of my fear. Well, he never slept so of course we didn't either. After we decided to stop fighting him on this, he slept soundly....but I didn't. I stayed awake the whole night making sure he was breathing. I finally settled on using the baby monitor on a very loud setting.
It's what you're most comfortable for the family. If you are not sleeping, and your daughter is not sleeping....well, there's not a lot of joy for either of you. It's a matter of weighing the risks against the benefits.
Good luck! You need sleep too!