A symptom is a sign of something, usually not good. For instance, a fever, runny nose, and sore throat may be a symptom of the flu. A loud knock may be a symptom that your engine has problems....
Pregnancy symptoms include
missed period, nausea with or without vomiting, tiredness, dizziness, breast changes and breast tenderness, and frequent urination.
Feelings of sickness (nausea) affect...