How do I remove myself out of a category?

Annaliesa
I am looking to see how I remove myself out of a category since I recently experienced my first pregnancy and then miscarriage. I was invited to group of October 2016 babies but now I am not sure how to remove myself from it. If anyone knows, please pass this information forward. I am happy for all those who are expecting but it hits a little too close for me than the other rooms. Thanks in advance!