Symptoms?

Lynn • Been ttc since October 2014. Been hard to have sex on days suppose to with s.o. a trucker.

We had sex on the 1 day that was the most important day to have sex.

Period due in 4 days counting the day it's due. I haven't had any PMS SYMPTOMS but have had bouts of nausea yesterday and constantly today.

Is it to early for nausea or is it possible?? I haven't had any implantation bleeding, was told that not everyone does??