Anyone was pregnant with twins and lost one of them?

At my 9w1d ultrasound Couldn’t find Baby A heartbeat but Baby B is healthy and strong heartbeat.

How did you cope with it? I feel so bad that I’m feeling sad and unmotivated and all the excitement is gone although I’m still pregnant and Baby B is healthy... I don’t know what to feel or what to do it’s just like there’s something messing something wrong,

After all these years all these miscarriages i felt so blessed being pregnant with twins and it was a boy&girl “i know the gender of early because i chose via <a href="https://glowing.com/glow-fertility-program">IVF</a>”

I’m trying to think positive and be strong for my Baby but it’s so hard... any advices please? Anyone being through this?