Yes, all of the symptoms that you have described I also get. I am 42 and have been diagnosed with lupus sle 10 years ago.
It took the doctors 10 years prior to that to diagnose me, but I was very glad because I knew something was wrong with me.
Are you currently on plaquenil and antidepressants? I'm taking plaquenil and celexa and also am using parriet to control my stomach acids, because that can keep me awake at night.
I do find that there's certain foods that I cannot eat, such as processed junk and greasy stuff. Otherwise, I will be running to the bathroom with half an hour of eating them.
Sometimes it feels like someone is stabbing me on the side of my stomach. And then it will go away, and not come back for weeks, this usually happens when I am on pms.
When you are tired, listen to your body...Rest and lots of it. Even if you can only have a 1/2 hour nap here and there it helps alot.