Dr. Sameer Kumar
MBBS., MS (OBS/GYNAE)., FMAS., DMAS., FELLOWSHIP IS ASSISTED REPRODUCTIVE TECHNIQUES
Infertility, Obstetrics And Gynaecology
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As the pregnancy tests were negative even after eight days post missed menses, it ensures that you are not pregnant.
The symptoms you had were common PMS symptoms (premenstrual syndrome), which subsides slowly once the menses start.
There is a possibility that a large endometrial chunk would have got passed out during the start of the flow due to delayed menses this time. So, just allow the menses to continue and you should be fine.
The chunk was definitely not a gestational sac or pregnancy, as the pregnancy tests were negative.
For further information consult an obstetrician and gynaecologist online --> https://www.icliniq.com/ask-a-doctor-online/obstetrician-and-gynaecologist