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Your symptoms as absent periods,mood swings,breast tenderness,discharge are very much suggestive of possible pregnancy symptoms.If yu had unprotected sexual contact then high chances of conception are present.
Urine test can take time to give accurate test as the hormonal levels being low it is not detectbale.Get a Blood test done or USG scan for pregnancy determination.
Kindly visit a Gynaecologist for evaluation.
Take care!