Don't really think I am.. But getting concerned

My bf and I,(of 2 years) are sexually active and rely on the pull out method, so it's definitely possible that I am..  Here's what you need to know to get where I'm at.  1. We had sex on two different days while I was fertile. 2. My periods are normally right on schedule.. AF was supposed to be here Sunday and still hasn't come. 
3. I took a test on Monday and Tuesday I believe, both were negative.. The second one the negative line was really light which I thought was weird but maybe that's just something that happens some times?  And last 4. Today Iv had a thicker? Creamy white discharge, which Iv read is a sign of early pregnancy..but I have no other symptoms other than being a little hungrier than normal..
Do you think I took my tests too early? Even though I feel like I didn't because i took one the day after I had missed my period.. Should I probably retest? When?