I agree with the comment below about going with a plan A of loan modification or refi if you like and can afford your home. Loan modifications can be excellent but they can be tricky. If you use a service, many do not have a guarantee and I have heard of people locally being charged $4500 to have a service do the work for them. This seems like money well spent but they dont always accomplish more than you could on your own and they usually only suggest that they will get you some type of offer. If you dont use a service, you may want someone else to look over the paperwork that you negotiate for you, before you sign on the dotted line. Some people are getting loan modifications that seem great. 5 years with progressively increasing payments that seem doable but tack everything unpaid over that long term onto the principal. All I'm suggesting is that if you go for the loan modification be sure you understand what you are signing, completely.
If you need to sell, I think the idea of interviewing agents recommended by rockinblu is a great idea. I would select a few that seem a good, likely pick to you. Look at what their marketing plan is and more importantly how compatible they are with you and your style. For example, how do they stay in touch and how often do you expect to be contacted. A Realtor invests money in selling your home, really they usually do. However, if you are up front about your possible desire to withdraw the home from the market, the contract could have conditions written into it so that this could be done and everyone would know up front what the expectation is.
Good Luck. I hope things turn out how you hope. Now for just a touch of non-Realtor thought. I love real estate but in the end we need to be practical and realize that the house is not home. Family is home. The place where your dog snuggles under the covers or you read your kids a book, that's HOME. If the house is keeping you up at night, reconsider whether it is feeling like home. If you are loosing your good health over worries about your house, you may want to reconsider where you rest your head at night.