Hallow Dear,
Your
pregnancy test results were negative. However, the test was performed too early. Your menstrual cycle has variation from 37 to 42 days. Hence, pregnancy test on day 45 was just 3 days after the missed period. These tests provide reliable results a week after the missed period; earlier they may report false negative results. Hence, please repeat the test now on overnight morning first urine sample.
If the test results are still negative, the spotting you are experiencing could be an indication of starting the menses. Overnight stain of blood on the panties will turn brown.
If you do not start your menses, you may take some progestational preparation like
Deviry for 5 days with your Gynaecologist's advice. Then within 4-7 days, you should get withdrawal bleeding; if not please report to your Gynaecologist.
If the test diagnoses you to be pregnant, this bleeding is sign of threat to the pregnancy. In that case, get
ultrasonography done to find out the integrity of the pregnancy. Report to your Gynaecologist ASAP. You may need some progestational support to stabilize the pregnancy.
If the baby is non-viable, then it is a
missed abortion which will require evacuation of the
uterine cavity.
You had sex after all these events. So it cannot be the cause for the bleeding; however, please avoid sex till the final diagnosis is made.
I hope this helps you.
Dr. Nishikant Shrotri