If you are always on a 28 day cycle but five days late and get negative results from HPTs then begin bleeding that resembles period is it possible pregnant?

While it is possible to be pregnant despite negative pregnancy test results and the onset of bleeding that resembles a period, it is generally unlikely. Here's why:

A pregnancy test detects the presence of human chorionic gonadotropin (hCG) hormone in the urine or blood. hCG is produced by the developing placenta after implantation of a fertilized egg in the uterus. If you have a regular 28-day cycle and you are five days late, you would be experiencing the day of your expected period (assuming ovulation occurred on day 14). By this time, if you were pregnant, hCG levels should be high enough to be detected by a home pregnancy test.

It's important to note that negative pregnancy test results can sometimes occur for various reasons, including:

Early testing: If you tested very early before implantation or when hCG levels are still low, the test may not be sensitive enough to detect the hormone.

Chemical pregnancy: In rare cases, a fertilized egg implants but doesn't develop properly, leading to early pregnancy loss. This can cause a slight delay in the period and may give a faint positive result on an early pregnancy test, which later becomes negative.

Implantation bleeding: Some women experience light bleeding or spotting around the time of implantation (around day 6 to 12 after ovulation). This bleeding can be mistaken for a period, but it is usually lighter and shorter than a regular menstrual period.

However, if you continue to experience bleeding that resembles a period and have concerns about pregnancy, it is always advisable to consult a healthcare provider. They can perform a blood test to accurately detect pregnancy hormones, rule out other underlying conditions, and provide appropriate medical advice based on your specific situation.