Please help me im too much disturbed by the thoughts if im pregnant i have 2 kids and i tried the injectable, and stopped at the first dose after i started taking glucophage 500mg...for diet purpose i had my menstaration on july 3 times in one month.. had preganacy test last week october 4 !! it was negative . . . .does stopping at the first dose of contraseptive will change my cycle.... please reply looking for answers...