Is it a slight chance

Keturah • Please someone that know give me advice
Hi Iv been on DEPO for 2 years I'm off now. I been off about 2 months now and I had sexual relations and yes I been on a cycle but they last a very long time but be light. I started on. The 4 of November and ended on the 15 and I had sex on the 16 at 7.20 am and that my BD I HAVE A CHILD ALREADY HE DONT BELIEVE IN CONDOMS AND HE PULL OUT AND IM TRYING TO SEE WILL I STILL GET PREGNANT EVEN IF HE PULLED OUT AND MY BODY OUT OF WACK IDK WHEN IM FERTIL OR OVULATION BUT TODAY I HAD A SLIGHT BLEEDING AND IT WENT OFF COMPLETELY AND NOW I DONT KNOW WHAT TO DO OR WHAT DOSE IT MEAN  I GO TO  THE DOCTOR IN THE MORNING I WANT TO GET ON THE PILLS BUT WHAT SHOULD I DO HE PULLED OUT THOUGH