Hi! I am new here and what a first post! lol
I just started metformin last Friday and I am on 500mg just once a day for the first week, then 2x a day and ultimately 3x a day.
Anyway, I haven't had any bad symptoms that I was expecting, however, I am noticing I am more constipated than usual. I am a very 'regular' 2-3 (sometimes more!) times a day girl. But now it keeps getting less and less and I haven't had a bowel movement all day today! i went to the store and bought myself some Fiber One Oat Clusters. They were yummy, but still nothing.

I don't want to overdo it so I don't get the opposite problem.
Yesterday I literally felt sick because I felt like I needed to go but I couldn't!
Has anyone else had this issue with metformin? Any suggestions?
My only other 'side effect' might be headaches too. I have had a headache almost everyday following them as well, but that might be my singulair too, i started that just 2 days before the metformin.
Thanks for any comments and suggestions!!