Is it possible to be well into 1st trim w/o knowing? Worried if sex would cause any issues for baby. Wouldnt I feel cramping all time?

Being Pregnant. Are you pregnant? Have you missed a period? Is this all theoretical? Cramping is not a symptom of early pregnancy. It is a symptom of infection or premenstrual problems. Pregnant uteruses try to keep the uterus stable and not try to expel the fetus. Most couples continue their sexual activity throughout pregnancy.