Ive never had a tubal (ectopic) pregnancy, but I have friends who have. They have explained some of the same symptoms you have, they have also complained of sharp pains in the lower abdomen. You can still spot or have a discharge if you are pregnant (even if its not tubal). A tubal pregnancy can be dangerous. You really need to see a doc. Im not sure what other advice I can give you, and I know you are scared. I think the best thing you could do is see a Dr. Right away. Dont panic, things can be done if this is the case. Please let us know what you decide and what is going on. Take care.

An ectopic pregnancy is where the fertilized egg travels through the uterine cavity for implantation in the uterine wall. It occurs when ectopic pregnancy occurs when implantation occurs outside the uterine cavity, usually in the tube itself. They only occur 1 out of 100 pregnancies. So don't sweat it. They can diagnose it with use of a laparoscopy, and with ultrasounds, even your hcg level. If it don't increase as it should (usually doubles in value about every two days) they suspect an abnormal pregnancie.
The symptoms include vaginal bleeding, pain in the abdomen and other signs, such as tender breast or nausea which occurs in normal pregnancies.
Truthfully hun, I think everything will be okay. I had all these symptons. The bleeding twice. They say the brown is good. I even had blood clots. That occurs when the placenta attaches to the uterus. I would not worry, but still go to the Dr. Let me know how everything goes. My e-mail is hearenbaby8504. Hope I made a little more since out of things for you