Spotting after going to chiropractor.

My chiropractor knows I am pregnant, (he told me I didn't have to until I wanted) I saw him yesterday and he had to be a little rougher with my hips because my lower back wouldn't move. About 3 hours later I had some bright red blood when I went to the bathroom just before bed I went on last time and it was brown and less than when it was red.

Didn't have any more until going again a couple hours after getting up. It was still brown but it was about as much as when it was red. Think this could be because of going to the chiropractor?