its official we are TTC

so after a long time my husband and I are TTC. we have been together for 8 years we have never tried but we have never gaurded against it. I told my husband last week, I should be ovulating next week and on Tuesday it's my highest chance. I have been taking prenatal vitamins, as my doctor recommended, and montering my cycle and temps for about a year now... getting my self ready. so I told him this and he finally said yes. that he said he isn't totally ready for a baby yet but that he will try. I am a bit concerned... we haven't officially been trying but I've been montering And in the last year I have facilitated sex several times during my ovulation winodw and nothing has happening in all these years. and I am also worried that once we do conceve he's going to regret saying yes. has anyone else man said yea prematurely?