Pregnancy

Alright ladies! let me start with admitting I'm a dumbass. I had a baby recently. I'm on my period (which has clearly been fucky since I had him). i just had sex with my baby daddy and didn't use protection. I have a menstrual cup in but I don't know if I'm still in the clear because I've heard you become so much more fertile after having a baby. Has anyone ever accidently got pregnant with a menstrual cup in while on your period? please please PLEASE tell me my chances are slim, because I can't do another baby right now