I can't realy offer advice, but i'm in a similar situation.
My last period started on 3rd march. This months period was due some where between the 1st and the 3rd april. (my cycle is around 30-31 days)
so I am now somewhere between 5 -7 days late. I know this is early, but I did a home preganacy test (i brought a double pack and did two tests) one gave a very faint positive result, the other which I did later in the day showed a negative. The pack said not to read the result after 10 mins and too discard - but after 20 mins the second test also had a positive result. The woman on the helpline said the after 10 mins the result can show as poitive, even if negative as the urine leeave a line as it evaporates. So I waited a few days and did another test - this time a different make that does not become unvalid after 10 mins. Again the first test had a very faint (very faint) in the results window. I did another test later that day and it was negative. ????? Am I pregnant. I've been bloated and nausiated. I have made appt to see gp, but the tests i've used say they are as accurate as doctors tests and anyway the doctors apt isn't for another week.
Sorry this I a long reply - but it's useful to know that other people are having simiar problems with home preganacy tests.
If you have had one positive result it is likely you are pregnant as the kit can not react without the presence of the hormone. Faulse negatives are more common, as you can be preganat and just have diluted urine or lower hcg hormone levels - so if you have had a positive result - i'd go with that and see your doctor.

Donna

Hi, good luck if you both are preenant. Here's what i've heard. Even though the package might say otherwise, it is always best to take the tests first thing in the morning. The hormones would have built up over night while you slept and you will get a more accurate reading. Also, I have heard that it is possible to get a false negative result, but not as possible to get a false positive result. I don't want you to get your hopes up, but I do think you should go see your doc. While the store bought tests are almost as accurate as a urine test at the doctor, your doctor can do a blood test that is much more accurate.

Good luck,
msdee3

Also - all hpt's turn positive after a while. If you looked at the result too late, meaning an hour or more, its possible that it may have turned from negative to positive when you are not pregnant. If you have not gotten a strong positive at this point, I would venture to say that you are not pregnant.