Define "poor" credit. Below 640?
There may be options for a refinance, but it can be tough and costly.
Honestly, as the others have said, it may be wise to try and sell the property now. The market we are in is short available homes for sale and what is for sale, has been collecting very good money. The smartest move from your brief explanation is having me lean towards selling while the market is at its 7yr peak and going from there.
Feel free to PM me for more information if you would like.
Good luck,
-Marc