Early pregnancy symptoms or just overly optimistic?

Hello there. I have been religiously tracking my cycle for about six months now. My period is always a day early or right on time. I am now three days late, I have been having mild cramps for about three to four days now. They feel like mild day before my period cramps. I also have milky white discharge. Have been noticing it for a couple days now. I keep thinking my period has started but I go to the bathroom and I find out that it is just discharge.