Soy isoflavones ttc

Jessica
I started taking soy seeing that is similar to clomid just milder. Cd 2_6 are the days that it was taken...my cycle is every 29 days and af last for four. Well this is cd 7 and im still spotting. Which is understandable because of all the estrogen in soy but my question is .How long do you spot or your experience with soy