Welcome to HCM
Its highly unlikely you are pregnant, but always verify your pregnancy when in doubt. You could do a urine pregnancy test around due date of next periods.
As for metformin
, it doesnt have any role in your current situation. If you are taking it for PCOD and awaiting pregnancy, consult your gync for continuing metformin if you become pregnant.
As for stomach cramps
and body pain you can take dicyclomine
I am sure you will be alright soon.