A late period is the first (but not 100% sound) sign of pregnancy. Thatâs why a pregnancy has to be confirmed by both a pregnancy test and an ultrasound to be certain. Watery discharge is not a sign of EARLY pregnancy, but it can be a sign of vaginal infection. You can take a pregnancy test to find out if you are pregnant and can then proceed to a gynecologist for a colposcopy and a microbiological vaginal smear to check for infection.