Help calm my anxiety

I am 7 weeks 4 days pregnant, first time in 3 weeks having sex. 12 hrs went by and I feel a “gush” in my pants. Bright red blood not enough to soak a pad type but enough to freak out and go to ER. They did a sono and find a beating heartbeat (first sono since my original first one is scheduled for March 12) then Dr says are you expecting twins?! But baby B he could not find a beat, he said it maybe harder to see or could be losing that one. No cramps or anything out of normal (second healthy pregnancy for me 10 yrs apart).

Just wondering if anyone has a similar experience and both babies are healthy and well? Calling my OB for follow up, just wanted to ease my mind in the mean time.

Thanks in advance!!!

Update: bed rest until my follow up with my OB on Thursday. Another sono and talk with my Doctor.

I read a lot and I saw that some twins are not on the same gestational week and hoping that is the cause, maybe Baby B is a little “younger” than baby B. I said the entire time it was twins, and I want them both 😭😭 I just want them both to be healthy and happy. I’m sure everyone can relate to that feeling while pregnant, it’s just the most helpless feeling! As a mother, I’ve tried to calm this feeling because so many things we can’t control. I prayyyyy so hard right now for them to be ok.