Headache and scared of being pregnant

I got a really painful headache yesterday which made me feels dizzy and faint.

So i went to bed but i woke up in the middle of the night and the pain was still there

I woke up in the morning and my head still hurt with a throbbing pain and when i looked around my eyes had pain.

All day today my eyes hurt when i look around. And headaches. I keep having to take paracetamols.

This hasn’t ever happened to me before.

I had unprotected sex 3 days ago so could this be a reason? Also the app says im ovulating