PLEASE PLEASE HELP LADIES !! Implantation ?

Hey ladies! I just need some help , so I had unprotected sex both of the two days leading up to ovulation and a few times during ovulation. Lately I have been experiencing some nausea, before and after I eat I feel sick, my body temperature Is currently 99 and fluctuates. I had slight brown discharge on underwear and a little on the toilet paper, that was 2 days ago. I get dizzy spells and light cramps in ovaries . I am 8DPO , and period is supposed to come in 6 days. PLEASE help out if you can , I would love some advice of people that might have some clues . Thanks ♥️