I'm so sorry for your loss.
I was a little further along than you, so probably my experience is going to be different, but I was given cytotec to pass everything and it took about a day, with the worst of it being over the course of about 2 hours (really awful cramping and passing large clots... which I don't know if you'll have as badly since you're not as far along - I was 7 weeks and carrying twins, but at the point I had the miscarriage it was only two empty sacs). That was two weeks ago, and I'm still spotting but physically I'm fine. I would assume that since you're earlier, it might resemble more of a heavy period with a little clotting, but I think everyone is very different too so I don't know.
I hope it's easy and quick for you. There's nothing about this that doesn't suck. *hugs*