I agree with Maureen, discuss this with your agent and get an answer to your concerns.
The problem is that you have already started working with her. If a new agent were to represent you now, there could be issues later because you have already written an offer through her. That is why I said you need to talk to her. You accepted dual agency when you wrote that offer (or earlier).
Was she working with you prior to this house?
There can be ways to work this out. Sylvia's suggestion of talking to the broker is definitely a good option.
My apology, now that Greg poinited it out, I noticed that she represents both sides. I agree with Greg, this is called Dual Agency and most of us do not do that due to conflict of interest - where your concerns might come from.
Since this is after the fact where you have already sigend on with her to use her as your agent, she is already representing you. However, your purchase contract is really with the Broker of the agency rather than than agent (your agent), I still think you need to talk to her about your concerns. However, if you still do not feel comfortable, go to her broker and have the broker assign another agent to work with you before you switch to another broker.
Although I don't do it and I don't believe in it, there are times when dual agency works, but certainly not in your case.
Talk to you agent and tell her about your concerns. If you have specific questions, make sure you address them to her, and if she is not giving you the kind of answers you are looking for, you might have to rephrase your question. If you are still not getting anywhere with her, you might want to talk to her manager so you can get the kind of service you are looking for.
Buying a house is probably the biggest purchase you will make and it is very important that you understand everything and that you are comfortable with what you are doing.