<human>: Could you distill the essence of the text into 1-3 sentences?

I am just very overwhelmed. I am a senior in college and will graduate in December or next May with a BS in microbiology. I used to think that I wanted to be a researcher, I've worked in a lab for three years, and prepared for that career track decently well. 

Now I don't know what to do. I always thought I would find the one lab that fit me and I would be happy. I thought I would be happier once I started doing research more focused on the organism. I just realized that I hate the chemistry classes and closely related to chemistry classes in my major, and that I am more miserable studying the organisms than I was using them as research tools. I dislike staining slide, I get headaches using microscopes, and taxonomy irks me. I lenjoyed working in an immunology lab, but I can imagine that chemistry would be a focus there too.

I'm thinking about switching to focusing on a career in science writing, but that seems like a longshot and I don't have much experience that I can put down in writing despite being pretty good at it (Not when posting to reddit, but when obsessing over essays for a several hours.) I had an essay published a couple years ago through the university, but I have't had time to write since my classes got harder. I just applied to write for the university as a volunteer, but I doubt it'll work out. Besides, what if I decide that I don't like that very much either? 

The most important thing to me is having a career that I enjoy and am good at, so it has been really bothering me. My grades are declining because I feel directionless and "what's the point?" besides logically knowing that bad grades will only hurt ANY application to anywhere.

I am going to graduate soon and don't know what to do. I'd like any advice or anecdotes about how you managed. Even better, what's a good way to make myself focus on finishing up my education with better grades when all I can focus on is how directionless and miserable I am?
<bot>: I don't know if I picked the wrong major, aleniated myself from a possible (though unlikely) career, and need to stop worrying about it to focus on graduating at least.