Hi I Watch A Lot Of Your Videos On YouTube

Hi I watch a lot of your videos on YouTube which are great and I have some questions for you. Well for starters I have a regular period that come every month and it's a 28- day cycle. My last period was on May.2nd to May.5th(of this year 2015 of course) I had unprotected sex on May.14th which according to my period calendar app was a fertile day for me and my ovulation day was on the 17th. Also according to my period calendar app which is never wrong my period was suppose to start on May.31st. Now from May.23rd up until June.2nd I experienced very light cramping overnight every night up till around 7am. I didn't start bleeding until on June.2nd I started spotting a little pink blood(which has never happened to me before) When I sneezed it hurted I got a small cramps which I searched could be round ligament pain which occur in pregnancy. Then on June 3rd and 4th I experienced diarrhea and constipation at the same time for both days along with light cramping and everytime I peed a lil dark red blood would come out and I had spotting throughout the day but overnight I would bleed a lot more than the spotting it would be dark red blood but not enough to soak a panty liner on both of these days. Then on June.5th When I would pee nothing would come out only when I wiped and their was also a weird dark like black blood jello thing on my panty liner which was real small it also had no smell I researched it and found out it could be black virginal discharge or mucus blood and also I light pink spotting throughout the day. On June 6th I experienced no cramping just really light brown and pink spotting wasn't even really spotting it was so light like I had stop bleeding but also was sleepy fell asleep almost twice I'm talking about to were my eyes were closing themselves(fatigued) Also a lil natiousness when I ate. Also had light cramps and a lil backache to wear it felt like something was wearing my back down! Then on June.7th I was sitting down when a spot of red blood came out when I would pee nothing came out when wiped blood there was a little brown blood on the tissue. Then today on June.8th I woke up with some light brown spotting and decided to take a First Response pregnancy test when I peed nothing came out but when I wiped there was light brown blood on the tissue anyway the pregnancy test came out negative. So I'm really confused all of this have never happened to me before for any other period I don't understand what's happening normally my cycle is real heavy I didn't have to use a pad not one time during all of this plus the weird symptoms I don't have a clue on what's going on can you help me please. And I know it's a lot that I wrote but thank you so much for reading plz respond immediately I'm going crazy here lol.