white on ultrasound

mo
I am not pregnant*** 
went to reproductive endocrinologist today for a work up before we TTC after 2 losses. She saw some white markings on the ultrasound and said it could be nothing but also could be scarring/cyst/fibroids and recommends a hysteroscopy to know more. 
Naturally I can't help my racing mind. Has this happened to anyone before and what was the outcome?