Aww.. I think that being scared of being disappointed again is just something that all of us experience and it just wont go away...
And yes, every pregnancy is different, you are not out yet. And if you really are pregnant then the best thing is to just enjoy every day you get to be with your little beanie. No matter whats going to happen...
I read this book once...that we have no control over other animals/creatures (also people) fates and their lives... and we cant change it... all we can do is, when they cross our road and become a part of our lives..then we can only try and make theirs a little better....
Like when a stray cat comes to your yard then you never know or cant change the fact that maybe it will get hit by a truck an hour later, but as long as its in your yard... you can feed it and play with it...
Sorry if the subject was quite random hehe

im in a strange mood today
Good luck to you!