I remember feeling so lonely right after my loss. I remember begging my DH not leave during the first week after my first loss. You develop this connection with your baby/babies. You talk to them.
And now that's gone. It's normal to feel that way.
The only thing that made me feel connected to my Isabelle was to hold her urn. I know it sounds weird, but when it hold it, I can feel her with me.
Try to find your special way to connect with your babies. It may help your loneliness.