By definition it is a loser if one holds it at a loss. It may have good prospects, but there is that unrealized loss nonetheless.
You say a week or two. Maybe. We've both been around the otc enough to know from experience that things often take longer than we think the will, and if a couple weeks becomes a month, then you are looking at long enough to sell, take the loss, wait out the 30 day wash sale rule, and rebuy.