Pregnancy or paranoid?

I’ve been lightly spotting for 4 days now. Off and on very very light and of course old blood. I’m not due for AF for another week.

I’ve been nauseous for the same amount of days, I believe a little longer.

Unsure whether to test or just ignore it. I’m not on BC; can’t use it so I track. The only time he came inside me was 4 days before my last af which was light and short. Now this. I’m typically late by a week or miss all together. So this is unusual.

When I looked up implantation bleeding it said it could be either pink or brown like what I’m experiencing but idk if it’s possible to be pregnant right now?

Thoughts???