I’ve been stressing over the appearance of my penis.

A lot of penile bumps and pink out line. I’m 18 are they ever going to go away

Could be anything. How sexually active are you? Do you use condoms? 

It's hard to say if it's unusual without a pic.  This should help you add images:

https://patient.uservoice.com/knowledgebase/articles/402861-how-do-i-add-an-image-to-my-post

You'll probably need to use a PC or laptop rather than a phone or tablet.