Too early for symptoms?

How early is too early for symptoms? I'm not due for AF until next week however I've been extremely fatigued, lots of bathroom trips, SORE breasts (holy cow), intermittent cramping the last few days, constipation here and there, heartburn the last few days (no change in diet and I usually don't get heartburn), and I got nauseous and almost threw up trying to eat my tuna salad lunch (tuna has never been an issue but it is now in the trash) and tuna sounds repulsive now.

Maybe it's all in my head because we are TTC and I know it's too early to test. Any hope?

I'm not sure on dpo because I'm still trying to pin down my cycle (it's irregular).