My periods are 4days late. have been having heartburn nausea and lower abdominal pains. could i be pregnant?

Possible : Any time a period is late & one is sexually active there is always a chance of pregnancy, though most people don’t develop pregnancy symptoms that early. A home pregnancy test is reliable & usually positive as soon as one day after a missed period, so worth doing. But if the lower abdominal pains worsen you definitely should call Dr