bliding after sex

I am in week 21 my husband AND I had intercourse few days ago , AND after it I had on my bed a big quantity of blood very clear red color. the next day I had like blood dirt on my panty AND the day after only when I wipe the area , I can feel my baby kicking . do you think its abnormal ?, I have 2 children 4 y &1y the last one was born week 35 caesarian. my age is 35y. thanks tal

I think u should b examines ASAP