Dear Bella,
I understand your situation perfectly. I �ve lived in that situation most of my teaching years, which is not many (only 5 so far) but let me tell you that there are solutions.
I always use material that I prepare, which is photocopiable material from resource books, handouts from this websites or simply things I create. There are great books available to help you out, but it will depend on what you want to teach.
Of course, the disadvantage of this situation is that creating or adapting material can be time consuming. But then if you think about it, what isn �t time consuming in teaching?
If you want more help, you can send me a private message.
Hope I helped a little bit