He lied to me.

This is a vent and I guess an ask for advice. My husband and I agreed to start trying again after my miscarriage in Dec. I let him know when the green week is coming up, because he he works long hours and he is really tired to sometimes just spontaneously have sex. He is always tentative to my feelings and loves me properly. He is a great husband in general but today he lied to me. We BD's this morning as my ovulation is about to be today or tomorrow according to my tracking. He did not finish this morning, and when I asked him why, he said he did. I told him that he didn't because there was nothing when I went to the loo 10 mins afterwards to get rid of the excess. He says that maybe it was just deep or less than usual and I asked if anything was wrong. He said no nothing was wromg and it was perfect as always and he did finish but i know he didn't. So a few hours later I went to speak to him about it because it bothered me. And he asked me why I think he did not finish, and I told him because there was nothing when I wiped and hours later still nothing coming out, and he asked if it comes out. I said yes obviously, where should it go otherwise. He then said we can try again tonight as it is a green week and he wants to. But I'm in two minds. He has a hell of a lot of work stress at the moment. There is uncertainty at the company he works for and went for an interview on thursday and I can see how it bothers him. But I cannot get over that he thought I wouldn't notice that he did not finish. I feel like I did something wrong and I wasn't "doing" it for him. Now I feel like this cycle is just gona be a dud anyway because I don't know how to feel comfortable trying again tonight or tomorrow. Just feeling off and really down. I asked him if he still wamts to try and he keeps saying yes, he really wants to, but I don't know.