This is why you start with small doses. I too was afraid of what I might see when on psychedelic medicine. I read alot about people contacting aliens while on dmt, and I imagined myself in a situation like that. How would I respond? What the hell would I do? Considering that I am a person who is still kind of afraid of his own basement.... I couldn't imagine NOT being afraid of meeting a real life alien.... that lives in my head. So, I took a low dose oral trip. I realized that a "hallucination" is not AT ALL what I was expecting. I was pleasantly surprised to find that fear actually becomes more difficult while on dmt, or mescaline (at low doses). The psychedelic experience is totally different from what you might expect. It's not the usual state of consciousness that you're used to, it's another world. It's actually the everyday world in which fears manifest all over the place, many times for no particular reason. When the entheogen hits you, it awakens something else within you, something that doesn't seem interested in fear.
And remember, I am talking about low doses. At high doses, it becomes terrifying.... but even then, it still isn't terrifying in the way that I expected. Anyway, my point is, why not take a small oral dose first, if you're worried fear? That way you can get a taste of what you're getting in to.
Mix 30mg dmt with some vinegar or water with a crushed vitamin C tab in it, and make sure the dmt gets dissolved. Crush it with spoon or fork. Take some harmalas 15 minutes before drinking your dmt. See what happens.