I'm not in control

I have come to realize that aspects of life rarely work out the way we want them to or plan for them to. In my own life, I try to plan things out. I cannot stand not knowing what's happening next. I hate feeling like I'm not in control. I've been thinking a lot about my future recently. My plan is to graduate a semester early, and either take a semester off before starting grad school or do an internship, yet somehow while I've been planning, it doesn't feel right. I don't know how to explain it other than this overwhelming sense that things won't work out the way I think they will right now.
Last week, I even had thoughts of changing my major, though they only lasted about 10 seconds before I remembered how much I love psychology and how miserable I'd be with just about any other major. I know that I can do a million things with psychology, which isn't the reason I chose this major, but there are only two things I really want to do and it scares me that for some reason neither of them will work out. I think I have this fear mostly because I don't like people which is a ridiculous thing for a psychology major to say, I know, but I cannot get past it!
Last week, I got an application packet from the hospital near school to work in the pediatric unit with the child life specialist which is so exciting because that is one of the things I would absolutely love to do. There are all these requirements in order to volunteer and all these rules (some of which seem like a little much) to follow at the hospital and I guess I'm afraid I will dislike it. It wouldn't be the end of the world if I disliked it. In fact, I would rather find out now than when I am in the midst of an internship or something.
The other thing I really want to do is research, and while I know that is going to require a lot of school, I think it would be worth it. The mind is amazing and it would be incredible if my job involved figuring out why we do what we do. At the same time though, I think about how much time and effort goes into just one experiment and I can't help but wonder if that's the way I want to spend my life. I can't help but wonder if there will be any significance to my research, though. I don't want to do something that won't have any impact on anybody. I don't want to spend my days duplicating research that has already been done, and even though I already mentioned that I don't particularly like people, or rather being around people, research seems like such a waste if it can't help people.
I guess what I'm mostly trying to say is that I'm thankful God is the one the one that's in control because otherwise I would have gone crazy a long long time ago.