pregnant

It's too early to take a pregnancy test but I think I've been having some pregnancy symptoms. 
Since ovulation (27th of Sep confirmed with a test) I've been having cramps on and off and some have been quite painful when I lie down. They have been mostly there during day.
 I have been extremely tired having a good 8 hour sleep and waking up like I've been up all night. 
My boobs aren't really small but feel fuller and on one nipple there is a bulgy vein. 
Yesterday I woke up feeling sick and  had naseua and headaches and backaches. I've also had for the last week white discharge. 
I know I should wait to take a test (Friday is when I should) but do I seem pregnant?