I agree its a bit to early yet,also implantation is normal for everyone,people assume that you get implantation bleeding when concieved this isnt true.only minority of people get it.if you were ovulating when you had sex then conception is possible but you will have to wait it out.good luck.
I suppose u are right.. i am just nervous because i never had bleeding in between periods b4 and don't know what other reason it can be.
3 days is to early for implantation bleeding.....also pms symptoms closely resemble pregnancy symptoms....so there is nl way of knowing if you are infact pregnant until you are late for your period.