I'm very sorry about your losses. I myself have experienced miscarriage as well, I can very much empathize.
Have you checked in with your gynecologist?
When did you begin to TTC again?
The spotting could be implantation spotting, though not many women experience that. (I didn't with my pregnancies.) Have you done an HPT? (home pregnancy test?)
Please call your gyn, you should probably be evaluated. It's best to speak to your doctor when having problems like this, we really can't say for sure what's happening.
I wish you all the best, please update.
Vida