Pcos, Nipple Tenderness, and Metfomin

Jennifer
I'm on my second round of Metformin (took some a year ago and it made my stomach sick so I stopped) and ttc now with my husband. I noticed yesterday that my breasts are super sore. Like I can barely touch them. 
Questions and Things to Think About: 
1) Anyone have these signs on metformin?
2) I've not had a regular period in years. 
3) I don't get tender breasts ever
4) I took a pregnancy test last week and it's no where near my period time according to the app documenting the last one (on bc to have one the last week of April) 
5) I'm bloated but also having the worst poops ever thanks to Meformin.