So I graduated university with a B.A. in Biology and a 3.3 GPA. My first two years were going fine and then my mom unexpectedly died between sophomore and junior year. The summer in between I volunteered at a hospital. Due to stress from my mom's death and the onset of a chronic medical condition, my grades suffered a downward trend. Since I wasn't doing so well my last two years, I didn't have that great relationships with my teachers. I did research for two years but when I graduated the professor and I weren't on the best terms. I now feel like I have no one to write me a letter. I didn't know how it would be viewed if I had letters from teachers who I had years ago. I assume if I apply to a program now, even if I do well on exams I might not have the best chances. I've been thinking about doing some kind of post bacc coursework/program. Thoughts?