Need some encouragement!

Today marks 3 weeks since our 2nd fet.(1st one failed) Got my first positive 4dp5dt, hcg was 438 on 11dp5dt and 1164 14dp5dt. My doctors were very happy with my numbers and scheduled my first ultrasound for 2 weeks later. I have 1 week left waiting for the ultrasound and my anxiety is crazy 😕 I'm so afraid of losing this sweet baby. We've had 2 chemicals and 1 miscarriage in the past 3 years. Our 3rd loss was weeks filled of ups and downs, from hcg not doubling, baby not measuring properly, to all of a sudden there's a healthy heartbeat only to lose it 4 days later. I haven't really had any symptoms yet, slight cramps since right after the transfer and sore breasts occasionally, I know it's still early for all that. I just need some encouragement and success stories of anyone who has had successful pregnancies after a failed transfer! So scared my sweet boy won't be there when we finally get to ultrasound day 😔 praying for our miracle! Thank you for allowing me to vent!