Don't give up. I graduated in December. At 4 months out, only 50% of my cohort had jobs. Now, at 6 months, all but 2 people seem to have work. Some are full time in their dream job; others are piecing together part time or on-call to get experience. It will happen for you. I recommend really tailoring your cover letter to the job. I sent out 100s of apps too with nothing. When I focused and wrote good cover letters, I got an interview for all but one position that I applied for. Also, call recruiters, go to the units that you want to work on, and be persistent.