Carissa, so many of us can relate. I was diagnosed at the age of 10 (18 years ago) and dealing with my diabetes in high school and later as a double major in college was awful. As a teacher now, I still deal with what you’re talking about. And I strongly second Kristin’s advice. I started by testing more - for about a year, and started taking my lunch to teach. I tried adding exercise (I go a few months on, few months off). Now, I log more. I test more. I not only take my lunch, but I cook my dinner every night. I take my insulin longer before my meals. One. At. A. Time. I promise, it helps. No complications, lots of worrying.
You’re going to be alright. Let this community of 4,000 strong (and counting) be your shoulder.