No pregnancy symptoms

I’m 4 weeks 5 days and I have no symptoms at all no sore boobs just tired but I’m always tired back pain hear and there but no actual pregnancy symptoms I’m sooooo scared back I’m 2019 I had a blighted ovum and I didn’t bleed with that pregnancy or have any symptoms…. It’s hard not to think it’s going to end up like that bc I have no symptoms at all when did you really start to get symptoms?