Is it normal for me to have smelly sticky white stuff coming out of my vagina after i have sex , my vagina doesnt hurt or redness or itchy ?

No: not normal. may be signs of a vaginal infection such as bacterial vaginosis. I suggest you be examined by a gynecologist.

Could be: semen but since a foul smell you need to see doctor and rule out an infection.

Post sex discharge: Yes. Of course. Semen plus your sexually stimulated vaginal lubricating fluids have no where else to go but to leak out of your vagina after sex. I don't understand how this is a surprise to you.