Vaginal bleeding, especially if it is heavy or getting heavier
Passing blood clots or tissue from the vagina
Cramping or pain in the lower abdomen, pelvis, or lower back
Sudden decrease in pregnancy symptoms, such as nausea or breast tenderness
Fluid or tissue coming from the vagina
Severe one-sided pain
Dizziness, fainting, or feeling weak
Fever or chills
Shoulder pain
If you think you may be pregnant and have any of these symptoms, seek medical care right away