Could I be pregnant?

Hey ladies! My husband and I are both teachers and ttc baby #1. Each day for the last week when I got home from school, I've been feeling so sick and queasy. I have not yet thrown up. My breasts have been a little sore, more than usual. I've also been feeling crampy, like I would feel during af, but she isn't supposed to come until the end of next week. I took a test today and it was a no-go. What do you think?