Biology. Itsy bitsy, teeny weeny biology.
Sorry, but microbiology is not the study of baby animals. That is, unfortunately, not a real science, as far as we know. Microbiology is actually the study of microscopic organisms, like viruses and germs. Not quite as cute as babies, but that's okay.
You probably have to be a science person to have any chance of enjoying this field of study. Needless to say, this major has a lot of heavy science involved. If you love studying life and want to make a career out of it, then you've chosen correctly. Congratulations. Now, get back to studying.
After getting the degree, there's about a fifty/fifty chance that you'll pursue a graduate degree, which guarantees you a really cool lab coat. Even if you don't go back for an advanced degree, you'll be able to pay the bills, live long, and prosper. Doctors, researchers, and technicians alike all have backgrounds in microbiology. This makes sense, seeing as they are all required to own microscopes.
Let's imagine for a moment that chemistry and biology fell in love and had kids. Somehow. The result would be fraternal twins named Biochemistry and Microbiology. They're different, but they also share a lot of similarities in ways that only those in the major would know. It's kind of like a secret society, but with less chaos and more books.
Percentage of US students who major in Microbiology:
Stats obtained from this source.