Other than a pacifier, sleeping on back, a fan, and not over clothing, what can i do to prevent sids? i constantly worry.

Bumper pads: Also avoid the use of bumper pads, stuffed animals, and excessive blankets in the crib.

Dont worry: Easy to say...Difficult to do. If you are following the recommendations of "back to sleep" and the other measures you mention, all is well. Worrying just makes you a wreck. If there is no family history of sids and you don't smoke, odds are very very small sids will occur. I would have a discussion with you in the office over why you worry so we can help ally your anxiety.