so i had my first Period on metformin (For My PCOs) and it lasted about 7 days... went a week…

so i had my first Period on metformin (For My PCOs) and it lasted about 7 days... went a week without a period tested with opk all those days and this past Friday Started a period again with heavy flow for three days straight and now it has come to just spotting... if I'm not bleeding tomorrow can I start back up with Opks?