Feeling sick to my stomach. Is this cuz of metformin

So I had my period Dec 14-18. Yesterday I had a very small amount of cm when I wiped that looked a little pink/creamy. All day yesterday I have been feeling sick off and on all day. I can't hardly eat anything because I just don't have an appetite. Everytime I eat something I feel sick again. I am on metformin 2000mg a day. Could it be my metformin making me sick?