Understanding Positive Pregnancy Readings & Ultrasounds After Lupron

Question
I am 22 years old, I have no children, and the last menstrual period I have had is unknown. I have endometriosis and I was on the Lupron shot. I took the shot twice and my last shot was in December. I could not take the Lupron any longer because of the side effects. I have not had a peroid since Janurary 20th. On March 3rd, me and my husband tried to have a baby. On March 12th, I was not feeling well so I decided to go to the family doctor. On this day he told me that my Hcg was positive. I went to have an ultrasound and they did not see anything, but he did say that my utreus was thickining. The doctor then told me that it was either too early to detect anything or the baby was in my fallopian tubes. My question is, can pregnancy be detected in that short of a time period, will the Lupron shot hurt the baby if I am pregnet?  

Answer
The Lupron will not harm the pregnancy or the fetus. However, since you have not had a period since January 20, there is no way to know exactly when you conceived. A pregnancy test will not show a positive result until 14 days after conception. If you had a positive HCG test on March 12, then you must have conceived earlier that February 28. If a sonogram only showed a thickened endometrium, you may have a very, very early intrauterine gestation or you may have an ectopic pregnancy (tubal pregnancy). You have to take two blood tests for pregnancy (Beta HCG), 48 hours apart. If there is a doubling of the results in 48 hours, it indicates a viable pregnancy. If there is a halving of the value in 48 hours, it indicates a miscarriage. If there is a leveling off of the results in 48 hours, it may indicated a tubal pregnancy. At 5-6 weeks gestation, a sonogram will show a gestational sac but no fetus. At 7 weeks, a sonogram will show a fetus and a fetal heartbeat. If there is any doubts or if you start to have severe pain on one side of your abdomen or the other with vaginal bleeding, laparoscopy may have to be done to rule out a tubal pregnancy.