Miscarriage or not?

I was not expecting my period until last Saturday. Well last Thursday morning I started bleeding pretty heavy. More then I would with my period. Thursday night I went to the bathroom and this came out. I bled Friday and Saturday as well. Saturday it was kind of on and off. I was nauseous and dizzy for a week starting around Monday. I have never miscarried before, but it seems like that's what it was. Also in the picture you can't see it but inside the sac looking thing there was tissue.