Abnormal Male Size [Help]

Hi, I'm 16 years old, Ever since the age of 8-13 I started noticing crazy growth in size of my private area, at the age of 16 im currently 14 inches soft and i find it extremely hard to get an erection takes like 15-20 mins of mental stimulation and touching and hard im around 18 inches and i never showed my parents cuz i was to shy / nervous to...but ive showed friends and they just laughed and freaked out im to scared to try to have sex with girls for the simple fact that i think im to big, even when i do get erect its not even hard i have to hold it at the base or it still bends is there some sort of treatment for this? should i see a doctor? cuz its really irritating i cant wear boxers or bathing suits or it hangs out the leg and it makes me really self conscious to go to the beach with friends and stuff but i have to wear like long shorts or jeans or sweat pants or something
any help would be appreciated