What's the worst that can happen? It still doesn't sell.
Question: How did you arrive at the price you're asking? Make absolutely sure it's competitive. None of this: "Well, we think it's worth $400,000, so we'll price it at $440,000." Don't think. Know what the comps are. Then price at or below, not above, the comps.
On the other hand, don't cut your price just to cut it (even though it's probably the right move). One week on the market is very brief, even in a decent market. In today's market, when well-priced properties can sit 80 days, 100 days, or more, it's too soon to panic. Just determine the right price.
Next, follow up with the potential buyers. Call them a week or two after they visit. Tell them the house is still available (no point in trying to twist the truth), and ask them what their situation is. Keep up a dialog with them.
Get a good home stager to come over and give you a report. It may cost a couple of hundred dollars...or maybe less...but you need an independent set of eyes to judge whether hour house shows well. Most buyers will be polite, even if they're looking at a dump. You need someone to search out the flaws.
Finally, depending on your level of motivation, you may want to consider using a Realtor. Yes, there's a commission, but commissions are negotiable. And Realtors bring a lot of knowledge and expertise to the table. Consider: The average person may buy and sell 5-6 residences in their lifetime. The good Realtor may assist in the purchase or sale of 5-6 properties in a month or two. Hmmmm.....
But don't panic. Analyze the situation. Follow through.