Since you have used it once, that is to say, it has been opened and some germs may get into your solution. The germs may have already been developed. What's more, your contact solution is expired. So you'd better not use it again and shoud throw it away.
No,you should not use it again. Though it has been used only once, there is still chance that bacteria can grow in the bottle. It will not cost much to get a new bottle of solution and it is safer for your eyes.