OB doctor

So I went to my OB/GYN, had a pelvic ultrasound done, I had some weird spotting (dark brown...) at the beginning of the month, lasted a little longer than a cycle, wasn’t like a cycle flow at all, just light and random

It stopped, nothing since

On the US she said my endometrial lining was thickened, had I had an actual cycle this month to which I said no, she then told me to take a pregnancy test and get back with her

Does this mean she saw something on the US that could indicate pregnancy?