So I'm well over 30 days late (last period was 3rd june) and was only a few hours of bleeding that stopped

I've took pregnancy tests and all come back negative, doctors are getting me in for blood tests back end of next week but I'm just asking to see if anyone knows what it could be, im not stressed, eating correctly, drinking plenty of water ect ect so I'm really confused I've been a week or so late before but not 39 days late 😐