Help - having serious doubts about adopting...

You need to take some time to think through your decision. There is a huge variety of responses to prospective adoption and certainly worry is one of them. I was not worried or concerned but it's not unheard of. Your concerns sound like they are reasonable for someone who may not be getting any support during the process. But you have an obligation to take the time to analyze them thoroughly and make sure that you're headed down the right path. Also it may help you a great deal to talk with families that were formed through adoption. Your agency should have already encouraged you to do this and facilitates the process, but if they did not then I urge you to do so on your own.