How early do pregnancy symptoms start?

I had unprotected sex on the 6th and he finished inside me. I’m 20 years old but I’m wondering how early pregnancy symptoms start? My boobs have been hurting since I want to say about the 8th or 9th, they ALWAYS hurt before my period however at the time my period wasn’t due for almost 2 weeks, my back has been achy, I’m having mood swings, my breast feel heavy. Yesterday the pain disappeared and now it’s back again today which never happens. And I’ve been cramping every few days. I’m not sure if it’s too “early” for pregnancy symptoms. I have not missed my period yet. I’m due for it in 3 days.

I was also craving spaghetti the other day which is weird because I hardly ever eat spaghetti nor do I like it, I also craved ice cream and pickle juice???