the other day I took a I.Q. test with psychologist but I scored 74 I know I have much higher I.Q. than that

I really don’t think my I.Q. is that low I know I can do everything on my own but I’m quite lazy & never try to learn anything. But do you think Iq test are really accurate like I know I have learning disability maybe that affected my I.Q. I know more capable than someone with score of 74 but I have near perfect memory I remember many things do you think I’m mentally retarded I know I act dumb but that’s just my personality I like attention. Please give your opinion