the unknown can be scary

We Iv been in hospital off and on the last two weeks 
Apparently baby a was taking from baby b 
Or there was something wrong with placenta my small home town hospital 
After false alarms of horseshoe kidney then fluid around the heart
All I could say is what next I'm 31weeks and this pregnancy had had nothing but bad news from my local doctor or ultrasound results and local hospital 
We they sent me to a major hospital 3h away 
Turns out nothing is even wrong they don't no why I'm bleeding but hasn't effected babies in no way shaper or form 
No infections and the major hospital said no sign of fluid around the heart no horseshoe kidney and everything look ok with size they are a little small but nothing to major 
So you can imagaine how much less stressed out I feel 
But how did my local help get it so wrong but I do show signs of going into labour early :( so I'm aiming to rest more and slow down I gotta make it another 5 weeks as that's where they will be safe to come into our big scary world :) 
Anyone else have issues that turn out not to be an issue at all