From my own experience I'm sure my H thinks the less he is burdened with gyn checkup information the better. He wouldn't care if I told him "I'm going to the gynocologist for a checkup today at 3pm" he'd say "ok". Unless of course it conflicted with prior plans he had made for us.
Unless he thinks you think you might be pregnant and hiding it from him? Weird. In any case, you handled it stellar-ly.