Please help me T_T

I am little lost...I had sex 21.12.2019 and I didn't use any ptotection. I think he didn't come inside me but I am scared.

I had my period on 28.12.2019-2.1.2020.

But my lower belly still hurts.

I had sex 1.2.2020 and again we didn't use any protection and I don't take bills and he came inside me.

I am afraid that I am getting precnant and my period hasn't started yet.