7 DPO symptoms?

I feel like it's too soon to have any symptoms, but I can't remember back to my first pregnancy. For the past two days I have had a headache and backache, and today I am very nauseated. Have any of you ever experienced symptoms this early in your pregnancy? Obviously, I'm still too early to do any type of testing!  I feel like I may be trying to make the symptoms fit the outcome I want...lol