Hcg levels not doubling

Anyone have any success stories of hcg not doubling every 48 hours and go on to have a healthy pregnancy and baby? They harp on this 48 hours, but then I see stuff online that when you’re below 6,000 it should double every 48-72 hours, and if it’s increasing by at least 35% it’s still considered normal. Just hanging on to the last little bit of hope I have. Please no negative responses, I can’t hear that right now 😔 TIA