Am i pregnant again?? 5 weeks postpartum

Hi so i gave birth prematurely at 33weeks via emergency c section. The blood stopped after 2 weeks and me and my husband have been having sex. Everything was fine. We usually use condoms but last week he went inside without a condom and pre came in me and also 2 days ago we had sex unprotected twice but he pulled out. Although he said he pre came alot inside.. This morning i woke up and had some light spotting when i wipe. Is this normal? I also have cramps in my uterus.. could I be pregnant again?