Faxing or not faxing

As RN, chg nurse I do much of the reporting to the MD's on the day shift I generally fax the chg of condition or updates to the MD, and wait for his response, if no response by the end of my shift I call the MD. I always call on anything I need an immediate response to, and then have to wait for him to call back, sometimes hours. My concern is our nurse consultant have informed us we are not to fax to the MD anything that needs a response. Basically NO FAXING, apparently a NH got into trouble when a faxed COC was sent and the MD didn't respond. The COC was considered not reported (did the MD recieve the fax? or maybe he didn't feel it was important to call back.) Apparently there was no follow up charting that the MD called back, only charting that the report was faxed. We don't have a NP or PA we can call for orders eg: laxatives, report non critical things, wound care chg's and day to day updates. Does anyone have a simular concern with faxing?