You may have a urinary tract infection , a condition that should be treated with antibiotics. Severe vomiting more than two to three times a day in the first trimester, onset of vomiting later in pregnancy, or vomiting accompanied by pain and or fever. Vomiting more than a couple of times a day could dehydrate and weaken you, although it won't hurt your baby. You need to speak to your healthcare provider about it. Fainting or dizziness may be a sign you haven't eaten enough that day, but it could also mean you have low blood pressure.
Many women feel light-headed during pregnancy.
In the event you faint, call your healthcare provider to rule out an underlying illness. You probably have an infection. Your doctor may prescribe antibiotics and rest. You don't want your temperature to rise higher than 102 degrees F for a prolonged amount of time as it could hamper fetal development. Pain such as severe lower abdominal pain on either or both sides.