It sounds like you would benefit from a thorough exam by a NeuroUrologist.
Are you taking any medicines or supplements, herbs, etc. ?
I don't understand what you mean by the 5th part of the brain.
So, do you have a wife yet? There are a variety of systems for improving virility. I would not worry about the fertility side unless you are actively trying to conceive. If so, talk with the urologist. But, you are only 19.
Where do you live? Maybe we can find a referral for you.
A Neuro-Opthalmologist would be a good way to check out your vision issues.
How is your blood pressure and heart condition? You will be surprised how that can effect you symptoms.
Mark in Idaho
58 years old, retired due to disability, married 33 years, father of three, grandfather of four, Suffered a serious concussion at 10 years old (1965) stopped most driving after last concussion at 46 years old (2001), Post Concussion Syndrome/Multiple Concussion/Impact Syndrome with PTSD, immediate and short term visual and auditory memory problems, slowed processing speed, visual and auditory processing difficulties, insomnia, absence seizures, OCD, 14 concussions since first concussion at 8 years old, Taking paroxetine and gabapentin for 12 years. Added L-Tryptophan and reduced paroxetine by half 3/2013
"Be Still and Know That I am God" Psalm 46:10