I am 19 and afraid of the dark, is that normal? any tips?

You sound just like me and I am the same age and everything. Everyone is afraid of something and it usually stems from something in our past or a horrible experience even. So i wouldn't say that your fear is not normal. What I do is usually turn on a neighboring room light. Like I will turn on the kitchen stove light or keep a light on in a room that doesn't have someone sleeping in it but is still close enough to illuminate the door area for me without blinding my eye. Also I have a nightlight on each wall in a blue toned light because it lights up the room but doesn't my eyes when im trying to sleep. Also keep a flashlight near your bed just in case you want to see something real fast. I hate noise but you might not so try listening to soft music which will help keep your mind off of the what ifs. Sleep with something that comforts you and also i find that this works for me those scented wallflowers that you plug in they for whatever reason the smell relaxed me. Hope that helps :)