The hormone your body makes when you're pregnant - HCG starts off low and doubles every two days or so. Some HPTs register a level that would mean you've been pregnant for a few days while others are more sensitive. Clear Blue Easy has a digital one (that's more expensive...) and there are some that claim to be able to detect pregnancy earlier than others. If you tested a week ago and nothing still - I'd test again.
What does it measn that my levels might be low?
>t.y
When tests come up negative but your period hasn't come - the recommendation is after a week with no period - retest. Good luck.
You could just be stressed, but I would def. go to the doctor and get a BLOOD test. Your levels could just be really low and not come up on a test. The same happened to me several times,... I would be 5-6 weeks pg and just then get a barely there positive. I have had 4 miscarriages, so my problem was progesterone, and my levels were too low. Hope this helps...