Hello On Sunday 8-16-15 I Woke Up To A Fish

Hello on Sunday 8-16-15 I woke up to a fish of brown watery discharge nothing the rest of the day. Monday morning I woke up to same thing but it came and went all day. By Monday night it turned lite pink I only have it when I wipe.. I have my tubes tide 2/2/07 I have had very bad cramping only on my right side when I have my period the past two years.. Now this I'm scared. Could there be a chance I'm pregnant