It's already been said, but knowing that other people are going through the same thing helps me immensely.
The first few months of IVF I'd cry at the drop of a hat and found it really difficult to be around pregnant friends. Initially I was too emotional to bring it up with anyone and would avoid people or situations. Eventually I had to tell some people because I could see that my behaviour was coming across as a bit weird!
The few people that we have told have been really supportive, but DH doesn't want too many people to know about it so mostly we've kept quiet - which is why it's so good to be able to talk here!
I promise it gets easier Good luck!