Concerns about a short menstrual period lasting only a day and a half have led to questions regarding the possibility of pregnancy. It's noted that if an egg is fertilized, it may not implant immediately, potentially resulting in light bleeding that could be mistaken for a period. A home pregnancy test may not be sensitive enough to detect pregnancy early on, especially if hormone levels are low. Consulting a gynecologist is strongly advised to rule out pregnancy or other health issues, as symptoms like feeling unwell and experiencing spotting could indicate various conditions, including pregnancy, infections, or stress-related cycle changes. It's emphasized that if there is any chance of pregnancy, proper medical guidance is essential for health and peace of mind.