Some small changes. A woman of childbearing age who has some nausea (with or without vomiting), some fatigue (feels less energetic), a sharper/stronger sense of smell, mild soreness/swelling of her breasts, and maybe some food aversions and cravings . . . Could be pregnant. Symptoms can occur before missing a period. She can do a urine pregnancy test 1 week after missing her period, to see if she will have a baby.
Sxs. 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.