Hmm pregnancy? period? confused HELP!?

Ok so i had my last period which started on june 15th and ended on the 19th or the 20th. My cycles are normally 28-30 days. SInce my period ended iv had using the pull out method on June 25th, July 1st, 2nd. Now if i follow my cycle calender i will be due for my period on the 17th of this month. Heres the weird thing. Im overly exhuasted, Im getting 7-8 hours and it never seems enough. Half way through the day i could take a nap, im very gy which has only been going on for 2 days now, but im also pooping alot more then normal (same with the farting), My hurt soo badly, my dont which is weird. before every period my itself always hurts not the nipple, I see more viens then normal around my area but only when my are soft, when they become hard the veins seem to lighten in color a big. I also had for only one day a gel based discharge which was about a week ago. mild cramps come and go, i had them on and off yesterday but nothing today. Im sort of confused because if had some of these symptoms before my period but not so far away and or not as severe and with slight twists to them. Can anyone relate? Anyone think pregnancy? I am well aware i cant take a test until i miss my period but thats my dilema, i really dont know when i am suppose to get my period because this will be my 2nd period off of birth control. I took a pregnancy test, a 6 day early and it came back negative. I will take another one next saturday but until then im anxious and a few words from other women would be helpful. thank you!