Advice anyone?

Marissa

So I had sex December 3rd and then exactly 13 days later I thought my period started but it lasted about 2 1/2 days when it usually last a week now so I took a test December 19th but it was negative. I’m supposed to get my period the 15th but it’s late. Now I’m spotting but not bleeding. Could I be pregnant? Should I test again? Mind you I have a two year old, and I’d be at most 8 weeks now 😶 I’m freaking out