Help please


So a week ago i got this test, which i assumes was positive being i had every symptom with it. Then last night, i started bleeding, A LOT. It’s not clots so much, it’s more stringy blood. My period was supposed to start yesterday, but this doesn’t feel like a Period, i never bleed much for my period. I got lightheaded due to how much blood came out. Could this be a miscarriage? I’m scared to go to the dr and them say it’s just a period 😔. I really thought we had it this time..