Talk to Gynecologist on Discharge.

MY age is 28.. married..1 c section.. had last c section in 2018.. I want to knw.. last night I had Intercoarse.. after that I slept without going to washroom.. after 3 hours when I wake up and I went to washroom I saw minor blood with discharge type. M too much worried because of this bloood. Mujhe discharge hota hai after Intercoarse but it is always white in colour.. this is the first time I saw blood.. no periods.. my period date is 15.. and my period cycle is normal like just 2 3 days up down.. and today is 31st so no chance of periods. What is this blood ? There was no blood while passing urine.. plz plz reply me