I was trying for almost 5y too! I knew immediately as it's an IVF baby, but like you I had zero symptoms it just feels surreal as I go about daily life. Now I'm at 20W there's a bump and the baby kicks all day so it feels a little more real now. I'm still not feeling any excitement though, just an impending sense that there's a lot on the to do list we haven't gotten around to yet.