miscarriage or pregnant

Leah • Mommy to a beautiful rainbow baby; Adaleigh Rose 🌹 💓
I have a quite dumb question, lol. I'm 5 weeks today, and of course have to wait 8 weeks till my first appointment. If I take a pregnancy test and it comes up positive, does that mean everything's okay? Or will it still come up positive if you have miscarried. ALSO, will I have symptoms if anything is wrong?
I'm just scared to go to my first appointment, and there not be a heart beat 😭😭
Thank you in advance 👶🏼💕