I had a miscarriage at 18 weeks, followed by delivery and manual removal of placenta. two month later went for an ultrasound on cd19, my endometrium lining was 3.6mm. I didnt ovulate this cycle. Reading online the causes could be damaged basal endometrium layer, adhesions, or simply hormone imbalance. My Ob is not concerned, but I am very scared. when should I test for hormones?