How To Stop Hair Fall?

hi..m 20 yr old engg student..i had thick hair growth on my scalp bt nearly 2.5 years ago after suffering from typhoid, 2/3 of hair were shed..now again these days m suffering from severe hair loss problem.if the things go like this i wud turn bald in a month or so...should i go for various blood test fo hormonal imbalance or shud i use some remidies..whom to consult.. please guide me