late.

sorry I haven't been on this in a while. I lost my baby. been hard but we are trying again. this month it was weird. I was suppose to start on Oct 18. I never did ,I did feel like I was gonna start on some days and I did feel sick in the morning sometimes. On Oct. 29 me and my bf had sex like 2 in the morning later When I woke up I started my period. My period last about 4 days. Is there any way I can be pregnant. Should i take a test when my period ends. My next period won't be til Dec 7th. What are your thoughts ?