hi i had gone through your query and understand your concerns. i would come up with the possibility of DYSFUNCTIONAL UTERINE BLEEDING
may be the cause for your sufferings.
-imbalance in the sex hormones ( recent pregnancy
may be the cause in your case )
-PCOD ( PLOY CYSTIC OVARIAN DISASE )
are other possible causes.ultrasound
scanning for pelvis may confirm the diagnosis.
I hope this is helpful for you, thank you