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Small size of vagina is a genetic prob. You may be having problem of inelastic hymen
which causes difficulty in penetration
,pain during intercourse
and bleeding sometimes. Get examined by a gynecologist for the same and if require have to undergo minor surgery to correct the problem. If white discharge is associated with itching and foul smell then you may be having vaginitis
. White discharge not associated with above symptoms can physiological (normal) and you need not worry about it. Take care.