I M Lossing My Hair, Doctor Says It's Hair Thinning

I m lossing my hair, doctor says it's hair thinning but what about me getting bald day by day. I m 25 years old and it's too early to loss hair, I m not even married. I thin I have fungal infection. Take treatment from doctor Batras. Should I take terbinafine drug to cure my scalp from fungus. Suggest me.