Normal reaction?

I had a saline ultrasound last Wednesday (December 9th) and ive been bleeding since. I'm not actually sure I would consider it bleeding. It's more like constant brown discharge...like my normal cervical mucous just changed to brown it's so odd. well it's been nearly 7 full days now so I'm wondering if this is normal...I called the fertility dr who did the procedure but go figure I haven't heard back yet!