Is it normal to smell burning plastic when there is none?

You might want to see a doctor. Although it's rare, smelling things that aren't there is a symptom of various neurological conditions.

I've been having the same thing like plastic or chemicals or even a dump fire ive asked other people around me if they smell it as well and they don't I've been smelling this for 2 days straight and it's constant every second every minute for 48 hours now it gives me headaches. Are you by chance a smoker?

Odd

Yeah I've heard people with epilepsy smell burnt toast... so maybe you have epilepsy???

I've heard that people with epilepsy often smell strange things just before they have a seizure.

Brush your teeth, scrape your tongue and neti pot the old nose holes...the problem could be you.