9 DPO?? That’s impossible.. or is it?

Anyone noticed pregnancy symptoms as early as 9dpo with second/third pregnancies as opposed to your missed cycle?

I think I’m coming down with some kind of virus, but did have unprotected sex twice during my fertile period. Today I’ve got a massive headache, diarrhea and gas, and threw up cooking turkey (abnormal af for me since I love ground turkey).