what would you do if your T denies saying something that you *know* T said and it was upsetting?

and you talked about it, but T still denied T said it.

relationship is new..some other things about T are ok so far

trust your self or question your self?

this feels so major to me, but i wonder if i should just drop it, continue on, and be more cautious and weary (which i already am alot!)