I had my tubes clamped 4 years ago took pregnancy test yesterday morning positive, took one this afternoon, negative. Should I see the doctor?

See your doctor. Tubal ligation is about 99% effective. Wen who become pregnant after a tubal ligation are at higher risk of have the pregnancy in the tubes. See your doctor right away. Go to the emergency room if you experience bleeding, cramping or especially sharp pain.
Yes. If you are pregnant and have a tubal, there is high risk for ectopic pregnancy. See a doctor as soon as possible.