The Igenex test doesn't cost that much. I believe it's around $250 now. You need to find out what all they are testing and why it's going to cost you that much.
You need to find out if your doctor has been ILADS trained. If not, you will have to teach them what to do and that can be hard, especially when you have to do the researching and you are sick yourself!
LOL! I think that you hit the nail on the head when you said that you feel like you've stepped onto another planet! The thing you need to learn most, is to come here to lean on those that have walked on this planet for a while already!!
And although I'm not CD, yes, this is how it starts. If you were to not treat, it would progress and you would begin to "collect" symptoms. Everyone is different and the symptoms do vary, but they will continue to get more severe and you will have more symptoms come on the longer you wait to start treatments. I was misdiagnosed for 37 years. I had a LOT of symptoms due to these infections and healing was quite a work of art since I had so much dysfunction in my body.