Thanks for the query.
Usually urine pregnancy
test kit can give accurate result after one week of missed period.
So the chances of pregnancy are some what less in your case.
Just by symptoms we cannot confirm or exclude the pregnancy.
So you go for either blood test
for pregnancy or ultrasound
to rule out the possibility of pregnancy.
If the test comes negative, you consult gynecologist and take tablets for withdrawal bleeding along with symptomatic treatment.
For more details you can ask me through the premium forum.