lost voice memos on phone during sync

I was sync'ing my iphone to my computer. I got the message that the iphone had been sync'd with another computer (my daughters) and it asked if it should "erase and sync" - I went ahead and said yes. In the process I lost 27 of 55 voice memo's. When I checked my daughters computer, the other voice memo's were not on her computer. Before "Erase and Sync" I did a backup to cloud and did a backup to local computer from itunes. Is there anyway I can recover the missing voice memo's that got deleted from my phone (via "erase and sync")? These are highly important memo's and would greatly appreciate any help to recover these. Thanks much in advance!

-Duke