AIBU to be pissed off with DP for not being 'in the mood' on ovulation day??

[lillamyy1]

We're ttc for the first time and this is the first month we've tried. Took about a year and a half for DP to agree that we're ready to have a baby.
He's been really good and we've dtd nearly every other day which is very rare for us!), except on the one day I knew I was ovulating, when he just wasn't 'in the mood' and refused.
End of my cycle now and just got a negative test result. AIBU to feel like this is his fault?

The pregnancies I've had whilst charting (4, 2 of them mc, 1 baby and this one), there was only one month I got pg because I had sex on 'ovulation day'.

Everyday is fine, make a real effort to have fun sex all month and don't tell him when it NEEDS to be babymaking sex, it's offputting enough when one of you knows about it!

Have you seen the website fertiltyfriend? Free trial and it's got a really good charting system (& forum full of people who understand the ttc craziness).