1 1/2 inch growth

I have been using the soap, liquid every day, the pills every day and the Creme, twice a day. I guessthat is correct. Now, for the record.I have only measured 1 1/2 inch growth in 6 months. I should have measured at least 6 inches in that time, according to the other people. What am I doing wrong. I was hopeing to achieve at least a DD by now. does not look that way. I will continue with the products. Is there anything I can add to the regimin to enhance the growth even more. I would love to be voluptous by now. If my body suddenly gave me a growth spurt to F cup, I would not complain at all.