When an egg is fertilized by sperm but not yet implanted in the uterus, is any harmone produced then?

Is there any harmone released by our body when the egg has been fertilized but not yet implanted? I am asking becaused i think i ovulated on the 30th of may and i have having symptoms like a runny nose, sore , sore throat and lots fatigue and i read somewhere that runny nose can be a pregnancy symptom and can occur due to change is harmones in the body like estrogen...but i dont when harmones actually start getting produced... is it after the egg has implanted or when fertilization actually takes place... i am ttc