Thank you for your query.
Fibrocystic breast disease
can lead to breast tenderness.
Regarding your other symptoms, they are non specific,and could be attributed to an early pregnancy
as well as menstrual or pre menstrual symptoms.
You are not too early to take a home urine pregnancy test.
However, an early pregnancy or a failed pregnancy or an ectopic pregnancy might not show up on the urine strip.
I would advise you to consult a gynecologist to confirm a pregnancy.
Rarely, it could be an irregular and scanty period due to stress, anxiety, emotional trauma, hectic travelling, recent fluctuations in weight, hormonal medication etc.
Also ask your doctor to rule out thyroid disease
, polycystic ovaries
or endometrial hyperplasia