E.M.
Hi M.,
a few thoughts for your SIL -
first, the book "Take Charge of Your Fertility" by Toni Wexler (I think I spelled it right) is a terrific resource. I used that for a long time to avoid getting pregnant, and then when we wanted to, I used that book as well. We also suffered a miscarriage, and it was really hard.
After that, we tried acupuncture (which helped me feel better and relaxed me a lot), but we did end up needing help from a clinic. But, the records I had kept from using the book were useful to my Dr's.
It does sound like the 9 day late period could have been an early miscarriage, she should ask her OB and see what they think. My fertility Dr. said one miscarriage is totally normal, but that three in a row were not, and (successfully) treated us (my daughter is 2 now!).
So, good luck to your SIL, and tell her to allow herself time to mourn the miscarriage and properly grieve the loss. It is so hard when you want a baby so badly.
Good luck!
E.