Most class syllabi will indicate when the professor needs to receive the suggested accommodation from the office and it typically is a bit before the first exam so that planning can be put into place. Here are some ways to effectively communicate and self-advocate.
As a pre-med, you should start planning for internships, jobs, and volunteer activties early. Read about how to start this process and have a productive summer.
Across the country, students routinely struggle in their first year at post-secondary institutions largely because, in their formative years, they are kept to around the same level of education regardless of skill or intellectual curiosity.