I'm ending my internship for the summer, and I got a fairly glowing review from my supervisor. After talking for a while about my plans, she offered to write me a very strong LOR for medical school. She's an administrator at Mayo Clinic who strongly knows what values and traits someone should possess in medicine and how to best exemplify them in a letter, knows the intricacies of interviewing/writing recommendation letters, etc. As a result, I feel like she could write me a very strong, unique LOR that I couldn't get from a professor, especially since her work is interwoven in a very large and well known medical facility. The only thing is, I was only there for ~3 months as an intern. I'm afraid if I ask her for a LOR in, say, April of next year, it might not go as well for me as it would now. I'm taking the MCAT this month and applying next summer, so is it possible to get it now or would I have to wait?