I am currently a first year PhD student and I just finished my 2nd semester. I am an international student and I was out of academia for almost 2a few years as I was working and didn't have the habit of studying. It was difficult to get back into studying but I was passionate about my degree and research. I scored 2 Bs in my first semester, one being my advisor's class.
In the 2nd semester I took an easy class and yet I got a B- which reduced my GPA to less than 3.00 and now I am on scholastic warning, meaning that I only have the summer semester to get my GPA back up to 3.00, else I am dismissed from the university. I spoke to my advisor and he said that if I have to take a summer class, then I have to. The problem is that my department doesn't offer any grad classes during summer, especially related to my domain and there aren't much available in other related departments as well. So I guess I only have 3 more months here.
My research also isn't going well, my lab mates are very unsupportive and always try to put me down. I am basically at a dead end and don't know what to do. I feel like a failure since I had no problem in academic or research a few years back.