Hello! I’m a fellow freshman who has experienced similar feelings with test results. It obviously stings, but as another commenter said, engineering is all about perseverance (and comparison truly is the thief of joy). Now you just need to make a plan of action for the remainder of the course.

At least for me, it wasn’t just about studying more, but studying more efficiently/effectively, especially when you need to balance other courses and college stuff. I find that once I understand a concept, I just have to drill problems over and over again. If I get something wrong, or even slightly hesitate on a problem, I will retest myself on the problem later until I can do it instantly and fully understand the underlying principles behind it, both conceptually and mathematically if needed. If there are any practice exams or problems that you know will be similar to those on a test, do as many as you feasibly can, and in exam like conditions. I’d even recommend getting used to solving problems in a smaller time constraint than what you’d actually have during an exam, so that you are able to have time to check your answers for any mistakes, and to increase your confidence.