Anyone's SO freak out about TTC after the fact?

So me & my fiancé are HS sweethearts. We recently got engaged 3 months ago setting a date for next June. Since then we decided with being 30 it was about time to start trying without the knowledge of any of our families. Anyhow, we've been trying for a little over a month. I just started taking prenatals in hopes it would help. 3 nights ago I was ovulating so I made my move. After the fact while laying with legs on the air he says are you really sure you wanna do this? I asked why would u ask that- thought we both agreed. His only response was "I just think it'll be hard is all." Idk how to take that.. does that mean he has changed his mind or am I blowing it out of proportion? Please help! 😩