Thanks for posting,
It is already nice to know that ultrasound
came out normal and that they are no signs of danger.
The causes of recurrent miscarriages
or abortions in particular women could be as a result of one of the numerous causes of miscarriages and that the specific cause becomes responsible for the miscarriages in particular women. Now following 3 previous miscarriages, the chances of recurrence is about 40%, meaning you have 60% chances of retaining this other pregnancy
. Meanwhile the chances greatly increase if your specific cause is identified and treated before or during pregnancy (in your case the cause will have to be identified now and if treatable then the chances of retaining this pregnancy are greatly increased).
the medications you are using presently should be continued as those alone are able to help protect some possible causes of your miscarriage.
The brownish discharge might just be physiologic and may signify nothing in particular. I also suggest you do a vaginal smear to rule out any possible pelvic or vaginal infection
that could in some way lead to a miscarriage.
Hope this helps and wish you the best