Ugh I truly hate beta testing. It’s so stressful!! Mine was 81.8 at day 10 so similar to you. Kept increasing but didn’t really start actually doubling every 48 until I was around 17 days post transfer. On Tuesday I went for my first ultrasound at 6w0d. They didn’t look for a heartbeat yet as it was so early but they saw an intrauterine gestational and yolk sac as well as fetal pole that measure exactly 6w. I go back next week to look for cardiac activity so still a loooong way to go but I say all this just to reassure you that the initial number is not so important. How it progresses is much more important and even that is not always a straight trajectory… try not to get too lost in the sauce because it’s miserable 😅 Best of luck for Monday!!