So from the date of my last period they put me at 5 weeks 4 days.. I’ve…

So from the date of my last period they put me at 5 weeks 4 days.. I’ve been having pain In my left side and mild cramping.. with severe dizziness.. my hcg level is at 717. But when they did the sonogram they told me they saw nothing should I be concerned also they said I have a small cyst on my left side.. could I be having a tubal pregnancy or miscarriage?