Hi H.,
I am so sorry for your loss, and for this confusing season in your life. I know personally how disappointing and sad this time can be.
I have had many, many friends who have had miscarriages (sometimes two) between children. One thing I've heard over the years is that it take our bodies at least 2 years to get our hormones back into a pre-pregnancy balance, although our bodies don't always follow that rule, any more than the "you can't get pregnant if you are nursing" rule.
If it were me, and I were wanting to continue having children, I'd check in with my gynecologist first. (Which is sounds like you have.) I also highly recommend Dr. Toni Wexler's "Taking Charge of Your Fertility". Your library might have a copy. I found this book extremely insightful.
My best wishes,
H.