Hcg levels be all and end all?

Anyone out there who had rising levels but not doubling early on? I thought I was 5 weeks but I think I’ve ovulated late on so I’d be 4. My levels were 1113 now there 1800 after 3 days. Has anyone else had a healthy pregnancy with levels that started off like this? They think it may be eptopic but if they levels had risen wouldn’t that mean it’s not? My heads all over, any reply or story would be great

Thank you