Speak to your Realtor about your concerns. You and your Realtor will have to go over the marketing plan. Does the listing have great photos, is the listing a showcase enhanced listing on Realtor.com, does it have a virtual tour, is it marketed internationally, etc. Also is your home easy to be shown, is the curb appeal as good or better than the competition. I do not know what you listing is like but sometimes we see listings that say 24 hour notice required and things like that. There is always a reason that the home is not being shown and it can be price, curb appeal, marketing, ease of showing or many other things. Make sure you are truly comparing comparable homes. I have had sellers say that home has sold for this price and it is comparable to ours, then I look it up and find it has 1,000 more square feet, a pool, and upgrades galore. Have your Realtor go over the comparables with you. As I said I do not know your listing but can give some general ideas.