I'm now 3 days late,but feeling that I'm gonna start.

On this app I'm 2 days late I think or I may be there because I had to move my period a day 3 times. On my other app I am three days late and this never happened before because I am very regular. I had sex in the beginning of October and had unprotected sex using the withdrawal method twice,and got my period late October that was shorter and heavy at first and slowed down. I really feel like I'm gonna start like I'm wet but I haven't started yet and I've been having a lot of discharge past few days.. I'm always more tired halfway through the day and last night I went out to supper and actually ate every single bit of it!! I usually never can. Have anyone had this and become pregnant? (We are not trying to concieve yet but we are not trying to prevent pregnancy)