You should really wait to do a pregnancy
test until a week after your next estimated period date. If you are regular, it sounds like it would be a week from today.
I didn't test positive for pregnancy until 37 days after my last period. My period was usually between 26-30 days.
Perform the pregnancy test with your first urine sample of the day because the pregnancy hormone is strongest then. Your light bleeding could possibly be implantation
bleeding. However, stress
also makes our body do funny things like have light bleeding or sensitivity to nipples.