Is it possible that I'm experiencing a missed miscarriage?

I took a home pregnancy test last week and got 4 positive results. The week before I'd been a little nauseaous a couple of mornings but it only lasted a couple of minutes. I've made a dr appointment for next week and they will do an ultrasound but they estimated the timing so far to around 5 or 6 weeks. Last week my breasts were extremely sore and I missed my period which is what tipped me off to take the test. But now I have absolutely no soreness in my breasts, no nausea, no symptoms at besides a little cramping here and there which is mostly due to gas. Is this normal or a sign that I've possibly had a missed miscarriage? I've not had any bleeding at all, not even implantation bleeding.

[runner5k]

It usually is not a good sign to loose pregnancy symptoms but that doesn’t mean you are having a miscarriage.  Maybe you could ask your doctor if they could order some blood work before your appointment to check your hcg levels.  They will have to check it a couple of times to see if the levels are doubling and then they would at least know the results for your appointment.  I had a miscarriage at 7 weeks and I had lost pregnancy symptoms and cramped (especially when I walked around a lot) for about a week before I lost the baby.  Then my next pregnancy I had some cramping and freaked out but it turned out to be nothing so you never know because pregnancy makes our bodies act really weird.