Which other reasons are there for getting a missed period?

Many reasons!: Besides pregnancy, common causes for isolated missed periods in women with previously normal periods include: include perimenopause, premature ovarian failure (if under 40), polycystic ovary syndrome, endocrine abnormalities, medication side effects, and prolonged high stress levels. If you miss more than a few, it's best to visit a gyn to figure out what's going on.

Take HPT: Possible early pregnancy sxs: no period, breast swelling & tenderness w darkened areolas, thin, white & milky vaginal discharge, fatigue, ^ urination frequency, constipation, bloating, heartburn, backache, cramping, headache, food cravings or aversions, ^ sense of smell, enlarged waist, feeling faint/dizzy, mood swings,^ gas, insomnia, gagging & yawning. They may begin after missed period.