These symptoms though

I don't know if I'm going crazy, but af is due on the 4th and this has never happened to me before. EVERYTHING SMELLS BAD. Literally went to class yesterday and on one side of the room a girl was eating caesar salad and I could CLEARLY smell the dressing, and on the other side of the room a girl was eating pita pit and I caught a whiff of it as soon as she opened the wrapper. My husband made dinner for himself last night and it smelled horrible to me. I went to Walmart and it smelled like sour milk soooo bad but no one else was bothered by the smell? I have sore breasts, just developed a touch a diarrhea yesterday night (still have it this morning), I've had a few mental breakdowns the past 2 days and I have no desire to eat anything. I have had tension headaches the past 2 days as well, but today doesn't feel as bad. I've also had on and off uterus cramps for the past few days, but every test I take is negative. Also, my temperature is normally 97.9, but it's been 98.9 for 3 days. Can anyone relate at all? I feel crazy. :(