Am I the only one?

So my little lady will be three months on Friday and I still do not sleep when she does. My husband and I take shifts watching her so someone is always awake with her- even when she is fast asleep. I am just so paranoid about going to sleep and worry about it. She had some noisy breathing for some time after she was born ( thank goodness it's better now and she hardly does it now) but it worries me so much that I just can't sleep as I always think "what if". I know we can't do this forever obviously (ok maybe until she is one lol jk) but just wondering if anyone else is like this or some advice about it. Thanks!