my last lmp was on 9-april-09 on 26th april my bf's penis has some pre-ejaculating semen , he touched it with his finger nd then wipe out by cloth after 10 min he inserted his finger in my vagine , his finger semen was dried , is it possible that iam pregnant , bcoz since last week i feel little nausea, but not vommiting.but from last 4 days i feel continuous pressure in lower abdomen always feel to urinate but bladder in not full. what is the reason for it ? is it a sign of pregnancy or anything else? is it possible that dried pre-ejaculating semen makes me pregnant??? please help me