You are more likely to have secondary amenorrhea
only if you:
Exercise excessively and for long periods of time
Have less than 15% - 17% body fat
Have severe anxiety or emotional distress
Lose a lot of weight suddenly
other cause may be thyroid dysfunction
so go for thyroid profile done and blood test
to check hormones level.
sticky white discharge indicate pelvic infection
pap smear test will rule out exact cause.