So sorry for your loss...
The longer you breed, the more likely "something" will happen. I lost three of a litter of five the last time my Pebbles gave birth... so I know how it feels... the "what could I have done" feeling....
Be thankful you still have Meiah... I think the loss of a mom would be harder on me than the pups.
It takes time... but you will be feeling better... We are all here for you if you just want to talk.