Januvia and sugars

I was taking Metformin(500mgs) and my sugars were very good. I told my doctor about 1 bad reading and she told me to try a new medication (Januvia). Since then I have trouble sleeping, wake up 4-5 times in 5 hrs and feel edgy all day. I take reequip for restless leg syndrome and it's been working, but now I feel like it's back and I know it's JANUVIA. I'm going to tell my doctor to switch me back to Januvia.

I thought I was tolerating Januvia pretty well, although it didn't seem to change my sugars much. However about 3 weeks into it I began to notice pain on my legs, especially my left. I can't really describe it as joint or muscle, it is just pain. I kept taking the medicine until it got really bad. I stopped taking the Januvia and the pain was gone in 2 days. I waited a week and started it again. The pain came back on the 2nd day. I have a doctor's appointment shortly and will discuss it with him. However, I'm not going to continue taking it.

I hve been on Januvia for 5 weeks, after not being able to tolerate Metformin. I have noticed a great thinning of my hair. Other than that I haven't felt better. Is hair loss a side effect?