Could I get pregnant??

Vanessa • Married, mom to a 4 precious boys💙💙💙💙

So my period cycle length is between 30-40 days, wen I get my period it last like 3-4 days and it's very light, yesterday was what I could call my last day with some brown discharge and I had sex with my husband and he cum inside of me. Should I be worry about getting pregnant?? I though I shouldn't but now I am a little concern 😕 please help!!