keeping it a secret

me and SO decided that we are wanting to conceive but not necessarily trying at the same time...i also want to add that were not telling anyone in our family regardless until it happens. the problem is that I think my family is catching on due to us all being extremely close to one another. So It's making me feel quite anxious and nervous .... has anyone else gone through not wanting to disappoint your family but obviously realizing you are a grown up and that your happiness depend on you and ur significants choices and whether or not you both are ready? any opinions on this if it makes any sense??