baby 9 weeks old could i be pregnant ? TMI

hi guys wondering if u can help I had my baby 9 weeks ago and had sex quite a bit since baby was 4 weeks old we have always used a condom but would fall around and have sex and put condom.on before he finishes.

since having my baby 9 weeks ago I haven't bleed or had a period. is this normal time or should I of had one by now ? and help would be great

thank you