Nobody listens to me I feel like I'm going to crack what to do?

Ever since I can remember nobody takes notice of what I say my family would always talk over me. if I came up with an idea for a way to do things a lot easier it would be ignore it and they would say don't be stupid then my brother or sister would say exactly the sane thing and my parents would go along with it. I couldn't stand it when I was a child and I am now 23 years old I've always found my family narrow minded and slow stereotypical and I really don't like them. Even in adult life when I'm working I come up with good money making ideas n my bosses jus ignore what I say then colleagues say the same thing and they get oh what a great idea!! After 5 years of working I decided to go back college and they tested me for dyslexia and found out I have a I.Q of 150. Another e.g. My tv reception is bad I told my farther it's the Ariel on the roof because it's loose I just brought a new tv and he thinks it's the tv even though the other tv's in the house are bad this is just one of the minute things that wined me up. I am not a shy person I'm not afraid to shout but nobody listens I don't what to do