Talk to Gynecologist on Took Ecp And Delayed Period

Aoa, i had my periods on 10th sept and took ecp on 20 sep due to unprotected intercourse on 18 sep. After that i had very minor light brown spotting for 5 6 days but there was no proper period. Now its been almost 2 weeks over the due date i have not got my period. I got b hcg done today and it showed <2 hcg level. I have a 9 yo son and he was also a late conception case i.e after 8 weeks of LMP tvs detected pregnancy. Kindly guide me what to do. I am having minor lower abdominal cramps and heavy watery discharge.