First off I am 20 years old so I am okay with it. My last period was July 6. My most fertile days are the 15-21, and my ovulation day was the 20. I had unprotected sex where he did inside of me on the 17 and again on the 21 & 22 where he also inside of me again. I've had hot flashes, slight cramps, painful joints, bleeding gums, mood swings, fatigue, frequent urination, kind of nauseous without vomiting, constipation , nothing sounds good to eat, heart burn, head aches and VERY tender nipples. I don't start my next period till August 5, but I started spotting brownish/pinkish VERY light on the 27, & still very light bleeding. which is weird because that would make me a week & a half early (never early) and its like 5-10 days after intercourse with him finishing inside of me. So I was wondering if it was implantation bleeding. I took a test this morning & it was negative, but they said I need to take another the day after my scheduled period. But I was wondering what are my chances of being pregnant.