how do you know if you have pcos?

i think i might have it, due to fatigue, excessive hair growth, acne that won't leave me alone, cysts on acne.. ugh i want to die. do you think i have it? where can i go to check if i do? And what were your symptoms of it?? 
also, is it hard to get pregnant if you have it because i haven't been able to get pregnant for 4 years now.