Vanishing twin

I know this is REACHING for hope. But, long story short. I found out I was pregnant on 3/12. On 3/21 HCG blood results were 26.8. Clearly, this was very low for testing positive over a week prior. When I think the pregmate test I use only detect as low as 25. Well anyway. Today 3/22 I bled pretty heavy in the morning, and by afternoon it was completely done. And nothing sense. Is it possible I could have had vanishing twin syndrome? And my HCG could rise back up? Or I’m I stretching for some hope 😭 going back Thursday for more blood.