A Scary Day

This morning G and I set off to our friend's place in a town about 2 hours drive away, it was their daughters 1st Birthday and I've been looking forward to it as the first childrens party where I was actually pregnant myself.
About 20 minutes in and I had my first bout of nausea and feeling rather close to being sick-I actually felt excitement at this!I got my HCG levels back yesterday which had another good rise at 11800 so I've been almost been waiting for the Morning Sickness to kick in!
An hour in and we stop at a cafe for G to grab a coffee, it's pouring down and we run through the rain laughing with G calling me his "Preggy Sue".
Go to the bathroom- I see red spotting.
Tell myself this can be quite normal and also tell G this. Sitting in the car I feel a nagging cramping which I try to put to the back of my mind.We arrive in the destined town and find another restroom before we go to the party. This time there's a lot more red blood and I start crying-I'm convinced it's all over and I tell G. We leave and head straight back home-another 2 hours drive. After the initial cry I feel reasonably calm and know I can't do anything about the bleeding-whatever's going to happen will happen.
When we get home I see that the bleeding isn't worse but there's some clots which have me certain it's not good...I left a message for the nurse at the clinic and then climb into bed, by the time she rings back the bleeding seems to have slowed significantly, and she tells me that there's lots of reasons for it and not to worry myself sick just yet....she said with such great levels the previous day it would be unusual for something to happen so suddenly, and a possible theory is that the embryo had split but one hadn't survived, or could be any one of a number of other possible theories....suddenly I have renewed hope.
So I'm officially on bedrest until further notice, and will have another blood test on Tuesday where I'm hoping like hell the levels are still okay.
I never knew how common bleeding during early pregnancy was until I got home and chatted to a couple of friends on a forum who were of great reassurance, and googling for once gave me some positive outlooks and hope rather than doom&gloom. I had just automatically assumed the first sign of red blood and cramps and it's all over....but it seems it's quite a common thing. It has still given me a huge scare though and I'm still as nervous as hell.I just want to know that everything is okay.
So definitely one of the scariest days I've had in a while-and hopefully the last-fingers crossed!