I think your reading too much into. Especially if he had a physically demanding job. I would just do surprise sex and do stuff like that. Start sending him nudes while he’s at work and when you’re in the shower or something. Make yourself desirable,
Intimacy is not just physical, its emotional too....ASK HIM 💁🏾♀️
Once could be a fluke. It happens to the best of us... Ask him if there is a good time coming up. Let him know it was hard to be snubbed and you'd like to avoid it happening again, if possible. Scheduling sex is weird but for a lot of busy parents it (allows you to plan and anticipate and it) gets the job done. Maybe try initiating without making the extra effort and see if he responds better.