My first fertility window since started TTC.

The topic says it all. My SO and I have recently decided to try for a baby! This is my first peak in fertility since we have made the decision. I am so nervous. I'm afraid that I am going to get myself excited and get heart broken every time I get a negative test. I am also afraid that I am going to get pregnant and then suddenly realize that I am not ready for this.

I just feel like a fish out of water. Does anyone have any advice or words they would like to share with me?