Post Interview Help ASAP!!

Ok, I went for an interview last week to a hospital job and she did not say 'you have the job' she said 'go think about it and then give me a call' so I took that as if I wanted the position she would more than likely offer it to me. I went to an employment agency the beginning of this week and she said she thought I had a good chance of landing something with them. I would rather get something through the employement agency because she is going to try to place me in an area that is a better for me vs. hospital. The hospital is really not my cup of tea. So now I am stuck..I do need a job so I hate to turn down the hospital one if the employment agency thing falls through. I need to call the hospital one back today but I am not sure what to say or tell her. I was thinking something like,

"thank you again for taking the time out to interview me. I was going to touch base with you and let you know that I have some interviews set up this and next week and I feel I should explore my options before making a sound decision."

What do you all think??

Any help is much appreciated!

Thanks all!! :)