This happened when I was in 8th grade?

relatively early in the year my teach (mr.green) asked a question and I answered him, (although apparently he misunderstand and I didnt realize this untell later) then later I told him something about that subject and he said you are lying to me either this time or last time and before I could say "no you misunderstood" he said were you lying to me this time or last time I waited a moment and finally last time and felt uncomfortable around him the rest of the year I also get the sense that he jumped to the wring conclusion others times although none that were so clear cut -I am wrong to feel I was mistreated?