i would def recommend not yet going with cereal - more problems than you have now in most situations with starting that early.
many many lo's go through this with rolling over and that's what i believe it is. you could try (as i have read - myself i just suffered through it for the while it lasted..
) roll up receiving blankets and put them under the sheet on either side of lo as to make 'speed bumps' and hopefully stop lo from rolling. otherwise it will pass, and before you know she will be rolling both ways and it won't bother her anyway
good luck!
