If the tests are positive and you are 18 days late I would assume that there is a greater chance of being pregnant than not. Consult your physician again and ask them for advice or another test.
Some women do not get a positive pregnancy test will late in their pregnancy , if even. A blood pregnancy test is the best way to go.
If you are a blood donor your blood can be given to anyone. Everyone who is O negative is OO negative, by father, husband and both my sons are all O negative. If you are a rhesus negative woman married to a rhesus positive man you may need to have Anti-D while pregnant and after delivery to prevent your blood becoming sensitised and affecting a Rhesus positive baby More elaborate answer on pregnancy in rhesus negative women: If you are a rhesus negative woman pregnant by a rhesus positive partner you WILL (typically only after the first pregnancy, but, it's suggested with any pregnancy of a Rh- woman) need a RhoGAM (Anti-D) injection in early pregnancy to protect the embryo from being miscarried from an attack by your immune system and again during or immediately after delivery to stop the fetal blood (which most likely will be positive) from mixing with your blood preventing your death. Negative can successfully mix with positive, but, positive will kill a negative.
sometime hpt gives false positive... if you took a doctor's urine pregnancy test and came back negative then ask for a blood test--a blood test will tell you if you are pregnant or not- even if you have low hcg in your urine-and yes you could still pregnant with all the symptoms---best of health
Depends...
Pregnancy tests are almost always accurate with home tests it is more common to get a false negative then a positive if it says you are pregnant then you are.... With a blood test you will most likely always get the correct reading because your blood changes it increases and it develops a hormone that is only there when pregnant.
You're not pregnant?
If the antibodies in Rh negative pregnant mothers attack the blood cells of an Rh positive baby, the baby may be damaged by a low blood cell count. This hemolytic anemia can be prevented by the use of Rhogam in each pregnancy in an Rh negative mother.
The chances of that happening are very low as false positive pregnancy tests are very rare
i would try another home test to be sure. the hormones that are used to identify pregnancy can be found sooner in the blood than in the urine.
If you have had a negative blood test, it is very unlikely that you are pregnant
A pregnancy test can only give you "a negative result" (probably not pregnant) or "a positive result" which indicates the likelihood of pregnancy. Only a blood test or physical examination can confirm a positive result (definitely pregnant). There are some conditions which have pregnancy symptoms, and very rare conditions under which pregnancy is not immediately detectable after fetal development begins.
No not unless your a troll