Unusual symptoms?

My recent cycle was longer so I think I have ovulated later this time but not sure as I only started testing later into my cycle but I feel like I’ve been hit by a truck today! Awful headaches, nausea, decreased appetite, sooo tired and weird sensations in my lower stomach. This isn’t typical for me when I ovulate. I’m really trying not to think too much into it think but if I’ve got a high today will I most likely get a peak soon or is this the perfect time to get busy?😅