Hello
Welcome to ehealthforum and thanks for writing
Of course a discharge like this is not normal and usually reflects an infection of either bacterial, fungal or parasitic origin. It is impossible to guess what the cause is without the benefit of examining you and performing a microscopic exam of the discharge.
I suspect however that what is causing this is either bacterial vaginosis or possibly a sexually transmitted disease.Trichomoniasis,chlamydia and gonorrhea can sometimes cause a vaginal discharge symptoms.It is advisable to get a Pap smear test done along with test for any sexually transmitted infection which would help in ruling out the cause.
Kindly consider taking opinion from Gynaecologist so that after proper examination and evaluation appropriate treatment can be started.
Take Care!