Just wondering...

So heres whats going on:

I had sex on atleast all of my fertile days. Maybe one or two i didnt have semen in me. On my "o" day and the day after no sex. For the past couple days maybe 5-7 days after my o day, ive had alot of discharge. I have back aches at times. Im now falling asleep in college, when i got 7-8 hr sleep. I think im constipated which makes my sromach look big lol. Ache which i hardly ever have. Is there an answer to all this so far as of my symptoms.