Have Continuous Eye Twitching. Any Solution?

So I ve had this eye twitch for nearly three weeks now, I m 16 and nothing has changed in my daily routine to give my lower right eye to twitch. I m not over tired because I m getting at least 8 hours sleep each night, I m not stressed and my caffeine intake hasn t changed so none of these three things could possibly be a reason. The twitch is clearly visible in the mirror as well as in my own vision- friends and family can both see it and they don t have to be standing right in front of me strainging to because it s that clear. The twitch looks like a pulse and in my vision in particular I see the bottom of my eye-lid go up and down very quickly. I ve tried eating bananas, sleeping, massaging it, everything and it just won t stop. I have a head cold at the moment but I know it s not that because the twitching started atleast a week before that. The only stress I have is this eye twitch i REALLY want it to stop- can someone PLEASE give me a way to make it stop without having to go into the doctors.