My hubby doesn't get ttc sex :(

So here's the story, I'm 6 years younger than my hubby and I've always had the sex drive in our relationship. Our first child was a happy accident a few months after we got married. When she was 2 we started ttc and it took 4 YEARS for number 2, partly because of my crazy irregular cycles but i also think sex had a part because the one month he just couldn't leave me alone is when it finally happened. So now we're a few months in ttc#3, we had sex once in the fertile window and a total of 6 times in my 36 day cycle (last one started by me because i knew my period was coming). Today i asked what i could do to get him from couch to bed without starting a fight and he says "stop trying to plan everything".

Here's the rest of the convo:

Me- we have to do SOMETHING or nothing will happen.

Him- i know that! stop patronizing me.

Me- I'm trying to make it easier before you get really busy at work

Him- well you don't have to plan it all out like, it's on the calendar let's do this

Me-i don't want to put it on the calendar! I want to make it less of a pushy, let's get this over with chore .

Him-You do it all the time when you're not trying

Me- really? Because it doesn't happen ask that often and I'm usually not trying to get you into bed.

Him-can we stop talking about this?

I really don't want to wait another 4 years. I've tried lingerie, I've tried letting him be, I've tried not telling him at all, I've tried letting him know it's coming so we should probably up or game for a week or so, I've tried just being the best wife i can think to be and still all i get is an argument... help?