Miscarriage???

Anna • TTC
I need help! I went to the doctors the other day and had a positive test... Doctor said I was anywhere between 7-8 weeks here it is a few days later I'm now bleeding and tissue like stuff and blood clots are coming out im no longer spotting i'm really nervous and I'm scared to tell my fiance I have a prenatal appointment on June 30th should I wait or go to the er?