hi! I am 33 yrs i have PCOD. I missed my period (which is mostly irregular) i have a child of 5 years.I am not planning for another. 4 months back i was treated with Susron NCR and got my periods after 4-5 days. this time again i took the same for 5 days as previously after confirming negative UPT and after dose completion it has been 5 days. when will i get my periods. is a ultrasound scan needed.