Very early symptoms

So my technical ovulation date is later this week. We’ve been doing the baby dance without any protection for about a week now.... and I feel funny. Obviously it’s way too soon to test but I feel so off. My head hurts, I want to cry about nothing, I’m tired, and just have an overall weird feeling.

Has anyone ever had instant symptoms? I vaguely remember feeling “off” with my daughter but that was years ago so I guess I’m just looking for more recent stories.