Thanks for the query.
The result of urine pregnancy
test kits depends on many factors like, the collection of urine sample, the time of reading of the results etc.
So, you once consult gynecologist get examined and go for ultrasound
By this possibility of pregnancy and miscarriage
can be ruled out.
If there is any evidence of retained products, you may need D&C.
If there are no signs of pregnancy, the symptoms you are having could be due to hormonal
For more details you can ask me directly through the premium forum.