spotting at 9 weeks, any idea's to try?

Hi, I've had 2 prior miscarriages in the last 3 years with the same spotting thing. Does anyone have any suggestions? Is Black Haw an option? What about Echinacea, I've used it at 8 months to avoid group B strep and it did great. Has anyone else taken it during pregnancy? I'd like to avoid another miscarriage, I'm doing self-imposed bedrest and the spotting is very light and brownish. Thank You!