I had a tubal ligation done 10 years ago and a Salpingo Oophorectomy on left side 2 years ago. Tested positive on a home pregnancy test Friday. Have to wait till Monday to call doctor to make appt. Today, Sunday, I have mild pain/pressure in lower abdominal and pain in lower back. I know if I am pregnant the risk/chance of it being eptopic is very high. Should I wait till tomorrow or should I go to ER tonight?