TTC but haven't told husband

I'm 32, I have a 5 and a 7 year old, and I have wanted to have another baby for years. Literally since my youngest turned one I have thought about it daily.  A few months ago I finally gave up.  I gave away my stroller, my crib, my pack and play and my changing table.  Then I missed a period and thought I was pregnant. When I found out I wasn't I was heartbroken and cried for days. Now the tricky part, my husband doesn't want any more kids.  He has told me repeatedly that we are done.  Two months ago I stopped using birth control and am now using ovulation/LH tests daily.  I feel awful for lying to him, but I want another baby so badly. Am I a horrible person?