What Causes Tiredness Along With Severe Hair Loss And Bloating?

I am tired a lot but very active. My hair is thinning and I feel bloated and feel like I am gaining weight in the mid section even though I work out hard every day. I am on birth control which hardly ever gives me a period and I like that-because periods are a "pain" about 2 1/2 years on the pill now. I am 43 . What can I do