Very early pregnancy symptoms

I was on the depo but I stopped it a month and a half ago. I had unprotected sex 2 weeks ago and my period is due in 2 days. I am experiencing unusual pains and feelings which I have never had before a period. I have white CM, and a dull achey pains in my belly. I have not had cramps just these aches. I feel nauseous and in the morning I have a headache. This morning (05/07) I woke up and had a headache and just felt really tired so I slept all day. And then tonight at 6:00pm I was sick and I took 2 paracetamol and felt a bit better then at 9:30pm our of nowhere a headache started and I felt really dizzy.

Could these be signs of pregnancy? If so, can people comment their earliest pregnancy symptoms please!!

I don’t want to waste money on a test just yet in case my AF does decide to show up so if anyone has had any similar symptoms it would help a lot!