Sometimes if you are overtired, your body gets overwired.  I know that sometimes if you do warm milk with some kind of flavoring in it, it helps a bit.  Also a hot soak with epsom salt can untension your muscles a bit to help witht he ache.   If you are extremely stiff then sometimes it is the matress that is the problem, and you need to try out several different kinds to see which is the most comfortable for you.  It can really make a huge difference in how you sleep.  As to nightmares, often that is something that has not been dealt with in your life that is coming back to tell you you need to face it and take care of it.  The nightmares can also be helped often with a blessing.  It is also never pointless to ask for help if you need it truly.  There are things out there to help, including some medical sleep aids if it gets too bad that you can get from your doctor.  I suggest the warm milk though, as it is an alternative that is non harmful as long as you are not lactose intolerant.  Sometimes chamomile and true mint help too with nerve problems.  I do not advocate tea, but this is pure herbs, just those two in warm water with sweetener.  It does help if you are having a hard time sleeping, and it also helps with stomach troubles to soothe those.  Sometimes soothing music helps, a night light if it is darkness induced, and maybe even the sound tracks with background noise odd as that sounds.  Some people when they get out of a huge family need that odd patter of noise to feel normal and comfortable.  I am not sure why that is, but something in the brain adjusts to that patter of noise, and it is hard to sleep without it.  Weird as it sounds, the house is too quiet for the brain and the subconcious says something is really wrong here, where did my comfort noises go?  Dumb as it sounds it works to have that sound track on to knock out the problem.  I hope you can get the help you need to get some sleep. Best of blessings,

Maraleh