Mmmm, that would be my story. I went to the first scan alone only to be told nothing was developing other than the sac. I waited three weeks and went back for the to re-scan alone, to be told my baby had died. I never saw a HB at any stage, and dealt with the whole thing on my own.
It was unfortunate (in so many ways, of course) that DH was not there, because he never felt this was real. But he never had the build up and let down of expecting to see a bubba and a HB and in the end just seeing a still screen. It was very real to me.
I think it's best to take someone with you. Not that I expect a single thing to be wrong love, but I really wish now that I had someone with me for support. Even if my story had turned out differently I would still have liked DH to have been there to see bubba for the first time.