Eyyyyyy I finally found the issue. Its been a week and I have not seen a Blue Screen yet. Turns out my brother updated the motherboard bios just before buying the RX 570.
Switching back to the old and stable build fixed the issue. I am soooooo so happy that I can finally play games without being afraid T^T
Thank you everyyyyy one, cuz it was because of you that I noticed I was using an unstable mobo bios!!!!!!!!!!