Well, nursing school is no piece of cake, but you also can't take your fertility for granted either. I had my son while in my third year of nursing school. I left right after the fifth semester since I was due, had my son, took a bit of time off, and then returned, completed the program and graduated. It wasn't easy, but it was something I really wanted to do, so I did it. From the sounds of things, getting pregnant is not something you wish to do, so I would wait if I were you. What if something happened or occurred that prevented you from returning to complete your program? You may hold that against your baby. While it worked for me, it was also something I made a decision to do because it was something I wanted. You know yourself best, and you want to wait, so wait.