a half inch growth

I have a question for you. I have been using the liquid, pills and cream for almost 3 months. I started 3/20/15 and I’ve only had a half inch growth Is this normal? I take everything as directed and I cut down on cigs and caffeine. I take vitamins, fish oil pills and protein shakes. before I started I barely fit in a bra from being so small. is there anything else that I can do or am I just being inpatient… lol Thank you!