Hi Emily,

as far as I know no side is better than the other it would honestly depend on your own unique situation, which side is the bigger side etc as depending on your uterus one cavaity can be bigger than the other etc.
Danger period, well some people have no issues others may have issues all the way through it can be dangerous the whole way through especially in the second trimester when the baby is bigger as it runs out of room to go, my doctor told me second term miscarriage and still birth can be common, but on the same token she also said that there may be no complications at all.
The opnly advice I could give would be stay healthy and look after yourself extremly well don't push to much and most of all try to stay positive, as hard as that can be with all the information I think you need to be in a positive state of mind.
Best wishes I hope the whole pregnancy goes very well.... and congrats on the pregnancy..
Take Care