Hey Dana! Have you ever had your thyroid checked? I'm not saying that is what it is, but you have discussed several symptoms on here at different times that remind me of how I felt when I found out that I had it. Extreme fatigue, irregular cycles, aches and pains in your back. Those (plus others) can be signs of hypothryroidism. Many people have it, sometimes not severe, and it goes undiagnosed a lot of times. Just something to think about.