Januvia and losing weight

When I first started taking Januvia it was like a god send to me. My bs dropped and I started losing weight. Since sugars were not low enough, I started taking janumet. A1C results were consistently 6.3 even tho' I ate anything I liked. Have taken Janumet for almost a year now and weight is 135lbs (height is 5'3"). Nice, since I just couldn't lose weight earlier (also have an under active thyroid and a sweet tooth). I recently experienced my first hot flash in an air conditioned room no less (am 46 yrs old). Started having migraines around my period. Left shoulder hurt when I raised my arm or reached behind me. Digestive system was a mess. Never experienced high blood pressure but had my first high BP reading at my last check up. Stopped Janumet after reading posts here and started feeling better right away. Digestion is normal. Don't know what to do now.

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?