Early Symptoms (headaches)?

I am 2 days away from possible AF. I have been feeling nauseous(mildy) and I have had a headache for the past 3 days. Yesterday,  I started spotting for a couple of hours and then it stopped, the same thing happened today. It's light pink but mostly brown. 
This is our first month of  active trying, I feel like I'm overthinking it and causing the headaches.
 Has headaches been an early pregnancy symptom for any one?