I'm new to this forum and just want to share that I understand exactly what you went through! I started bleeding at five weeks in August, and my husband and I thought for two days that I was in the process of losing the baby.
This is our first child, so I didn't know about threatened miscarriage, and my initial symptoms led my naturopath to believe I was having a miscarriage. We grieved, accepted the loss, told family members--everything.
And then on the third day I had a sense of not something quite right, did some research, asked the naturopath, had an ultrasound...and there was the heartbeat! It was just the best moment and such a relief.
Actually, grieving turned out to be a good thing in a weird way, because it really allowed us to just let go and accept what happens, whatever happens.
Congratulations on your own u/s results. Hope everything continues to go well.