After delivery hair fall is normal but I had my baby six months ago and still I have, is this normal? Please help me how to prevent this

This is perfectly normal! I got a shock too when my hair started falling out but it will grow back don't worry. It usually phased out frm month 7 or 8 onwards and you will slowly start to see baby hair growing on ur scalp and hairline. In the meantime I did use a hairfall tonic to just help with it.