I just finished grad school in May (masters) and it was really hard on my mental health. Overall a really great experience and put me where I want to be in life, and I learned a grew a lot, but the stress spiraled me into quite a mood episode and lots of anxiety. I am doing better now, though. Just know it really is hard and make sure you are taking care of your basic needs like eating healthy and having a regular sleep schedule as best as possible. Wishing you the best.