How soon is too soon?

Hey there. So it's about a week after my ovulation (at least going by eve). I've been having a lot of issues. I've got a stuffy nose, random headaches, hot flashes, nausea, constipation, crazy emotions, fatigue, and just generally feeling like crap. I have a little bit of a raised temp, but it's not fever high. I figured it would be too early for pregnancy symptoms and I'm trying not to symptom spot. Could it be though? I'm really hoping this is it.