HELP. NEED ADVICE!!

I am 8 DPO today. The past week I’ve been lightly cramping, a little nauseous, and sooo tired. This morning I woke up and just felt “weird”. I am well aware these could all be PMS symptoms too.

I took a test this morning and it was negative. My question is... how many took a test 8 DPO and it was negative, but took one a few days later and got a positive?

This is my first time TTC so I have no idea what to expect.