HCG Level Question

HI ladies! I'm stressed about HCG levels and hoping someone can give me an honest answer. I got my BFP on CD14 and my HCG was 63. Exactly 48 hours later (at the same time of day on CD16) we repeated the test and the level was 111. I heard they're supposed to double, and this result is shy of that number. The fertility clinic we used said that the numbers look okay, but it's early we now have to wait till an 8 week ultrasound to hear the heartbeat. That's over two weeks away! We went through a lot to conceive, and finally did with <a href="https://glowing.com/glow-fertility-program">IUI</a>/Clomid this cycle. Do these numbers sound okay? Is it okay that they didn't quite double in 48 hours?