Redo: who am I pregnant by?

Aishah • I'm a single mom I'm 19yr. I have a beautiful son

My period was in December 1,2015

Me n L had unprotected sex December 5,7,9,30

I had my period again January 2-6 2016

Me n T had unprotected sex January16,.2016.he pulled out went back in.

*me n L had sex January17.

My period didn't come on Jan 30.

I took 3.pregnancy test all came back post