First ultrasound this Thursday

Hello everyone. Our gestational carrier is 6 weeks tomorrow. Our first ultrasound is Thursday and my husband and I will be traveling to her state for the ultrasound. I have had 5 losses, all in the 5th week of pregnancy so I have never made it to the heartbeat ultrasound. I have PTSD from all I've been thru (8 transfers, 5 losses) and I'm scared to pieces that we won't hear a hb or this won't work out. I know it's the furthest we have come but my mind can't help but go to the worst possible place! Ultrasound will be at 6 weeks 5 days. Even though we're pregnant with a gestational carrier it feels as though I'm the one pregnant and I feel 100% connected and think about our baby every second.