Thanks everyone for your well wishes! I think they worked...
I went in expecting the worst... but... Baby is great!
So is my uterus, ovaries, cervix (LOL) .. they had to make sure those were okay too.
We got to see our tiny baby and the womb sac and the yolk sac. Everything is intact. Baby's heart is even beating already! It's heartbeat is 116 which the technician said is great for 5 weeks 6 days. I thought I was 6 weeks, 1 day, but I am actually back a couple days - so my online ovulation predictor was off by a couple days.
As for what caused the bleeding...
The technician said around 6 weeks, many women have bleeding or spotting due to further implantation of the baby. In other words, the baby is getting nice and cozy and making itself a deeper home in the womb sac. Implantation bleeding happens after conception, but the baby really does continue to attach further to the lining as weeks progress.
She said many women absorb the bleeding into their uterus and never see any sign of it, whereas some see all of it and it ends up leaking out. I'm one of those people. It is supposedly very common because she said she sees women every day in my same situation at the same 6 weeks, and all of their babies end of being great. In fact, she had three women before me with the exact same issue and their babies all turned out okay.
Yay!