I am an international student. I have applied to 7 schools and have been formally rejected from 3. One of them has put me on a waiting list and has mentioned that it is unlikely that they will give me an offer. The other schools have sent offers to other candidates but I haven't heard anything from them. I have applied for a PhD in Physics. My scores are good except for my undergrad GPA. I have emailed the remaining schools but didn't get any replies. I am losing all hope. Was really looking forward to get into some school.