I feel like I was completely coerced by my recruiter, and now I'm not so sure. Now what?

I came in to the recruiter's office completely set on finding out information about the Navy nurse Corps. 1 week later I was at MEPS, and now I'm enlisted and leaving Sept. 24th. That's not what I want!! When he said he'd register me at MEPS I said I wanted more time, but he pressured me into it. I feel like I was manipulated, maybe that's my fault for not standing my ground... All I know is that I want to get my RN first and foremost. I really would love to serve my country, but in the way I had origionally intended. Please help!