Talk to your hairdresser he/she may recomend something. My hair is fine so she said to AVOID shampoos with Protein or additives in them, the extra weight would actually split my hair that didnt fall out! She had me change to Save Daily Clear for a few months until we saw new growth.
I started loosing hair at about 6 months and stopped at 9. I didn't take any preventive stuff, I only started pills at 6 months, wish I had know about the pills from the start.
Biotin pills helped me. I continue to take them now. My hairdressers was so happy with the results she's added them to her routine also