I'm a PhD student and I got the grades for my first semester (grades for one subject got delayed and I only got them now) - B+ and a B. The B was expected because my class project went horribly wrong and I did a bad midterm, but I really expected an A or A- for the other (but got a B+ instead). I feel like a complete failure just waiting to be kicked out of grad school. What should I do now? I really want to succeed in this. Should I talk to my advisor about this? Am I the kind of student that leaves without getting a PhD?