Update on Little

We have been walking on glass since Sunday.  It has been terrifying.  Nothing else has happened to me physically, except for the fact that the spotting never came back (and I even hesitate calling it spott-ING because it was a one time deal and didn't come back once it made its appearance, but of course I didn't know that when I went into the ER).  I stayed home to rest Monday, the cramps went away, and I have felt totally fine since then.  I followed up with my OB, had more blood drawn Monday and Wednesday, and we had our first prenatal appointment Tuesday.
My blood results from Monday were inconclusive, which made the whole situation worse.
Really?
Inconclusive?
Thanks.
My HCG levels went up Monday from Sunday night, which was great, but the second blood test was only 18 hours after the first one.  It wasn't a long enough time period to show growth (it should take 48-72 hours to double) like they wanted to see, so I had to get more blood drawn Wednesday.  My lower back started hurting Tuesday night as well, so that was a little nerve wrecking on top of everything else going on.
Good News- HCG levels definitely doubled.  They figured out my progesterone was low (almost half of what it should be) and was 4 "points" lower than what it needs to be.  My doctor thinks this is to blame for the cramping, spotting, and backaches.  I am now taking progesterone pills to hopefully fix the problems and help everything continue smoothly.  I have more blood drawn Friday to test HCG again and another draw next Wednesday to test the progesterone to see if it is working (I don't think I am going to have blood left when this baby comes!).  Please pray that both of these levels increase and that we have a healthy pregnancy from here on out.
I used to think I knew my body pretty well.  I felt like I knew when something wasn't right and needed to call the doctor and when I could wait it out and let myself heal.  Now that I am pregnant, all bets are off.  I'm not sure if it has anything to do with the spotting, but every little thing scares me to death.  It has gotten better since we received this bit of good news, but I did think I was dying today- and it was gas.  I have been fearful also that our pregnancy is tubal, but I have no symptoms of it and my nurse said my HCG would not be doubling if it were.  They all but ruled it out when they prescribed me the progesterone, but please also be praying specifically that our pregnancy is not tubal.
Our hearts are nervous.  We should be able to hear our baby's heartbeat on September 13th.  What a glorious day that will be.  Thanks to everyone who has been praying for the three of us.  Please continue!  I don't understand how prayers fit into God's plan, but He tells us to so it must. It is hard to imagine that the same God who made the heavens and earth, holds everything together, and knows and is all things listens to and answers the prayers of his people. Truly awesome.

Lord, our Lord,
    how majestic is your name in all the earth!

You have set your glory
    in the heavens.
Through the praise of children and infants
    you have established a stronghold against your enemies,
    to silence the foe and the avenger.
When I consider your heavens,
    the work of your fingers,
the moon and the stars,
    which you have set in place,
what is mankind that you are mindful of them,
    human beings that you care for them?
^{Psalm 8:1-4}