According to the gynecologist, it's a miscarriage.

Hi,
That’s so sad for you! That sounds really heartbreaking to go through, and it’s completely understandable that you’re shaken. I don’t want to give you false hope, but I looked it up, and as I understand it, it might be that you can’t really hear the heartbeat yet (it’s there but still weak). I don’t know if that’s the case, but wouldn’t it be an option to just wait and see? Especially since you have a different feeling about it yourself. I’m not sure if you can just wait it out, but you can always discuss it with your doctor. I hope for the best for you, stay strong!