Another thing I thought of - we used to elevate (a touch) the mattress using the phone book or dictionary. That way if my girls spit up, it would roll down a bit. It made me having a tummy sleeper a little less nerve wracking.
BUT - I am so glad you are figuring things out. It's tough. And a lot tougher doing it on your own - major props to those that did this all on their own.
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