Should I tell my husband?

About seven months ago, I started a second Instagram account without telling him.

He and I have been TTC for almost 3 years and I felt like I needed an outlet. Somewhere I can talk about our journey and struggles without anyone we know finding out. I wanted to be able to talk with other women who understand what I'm going through and be able to form relationships with these women.

I have my account set to private and I am a little picky about who gets to follow that account (TTC accounts only and make sure no one we know).

I'm wondering if I should tell him though. I have a couple hundred followers and they are steadily growing. Since I do talk about him, I feel like he should know. On the other hand though, it's kind of like a form of a diary for me.