Heya,
I completely understand how it feels to suddenly lose the support and guidance of a counsellor; the same thing happened to me last summer. I finished my counselling in the June (had my counselling at college too) and then i spent the summer without counselling and it was very, very tough. I tried to book myself in to see a new counsellor through a private company but the waiting list was so long that i didn't get seen in the summer. I ended up emailing the samaritans a lot, and dropped in once to see someone face to face. It really helped me get through those really tough days (i would also like to add i wasn't suicidal, many people have the misconception that the Samaritans is just to help those with suicidal feelings, it's not). Could you try talking to your friends? I know that helped me an awful lot, as did going for long walks/ runs and taking time out for myself to think and unwind (i'm very fortunate to live about 3 minutes away from huge parks/ fields and rivers). Hang on in there, it won't be this bad forever, i promise.