It's understandable! your ex-husband worked for the military that's why they are checking you for security. Coz you were related to someone who might have had classified information (CIC's point of view) and gave that kind of information to you.
We are at 7 months and 11 days. My husband served military for one year coz it's a mandatory service in our country. He was just working in the office section, translating educational books, and he never participated in any military act. But we have undergone the same process since August 24.
Hope this ends soon, for all us!