Odd Symptoms

Okay, I had not had sex in almost a yr, then I had unprotected sex on what I found out later happened to be the beginning of my fertile period. My period should’ve been here Friday, no question in my mind. I have a 28-day cycle that worked like clockwork for the last 3 years or so. Before that, I was irregular. I don’t know if I should be concerned, because I am overweight, and I know that can lead to irregualr periods, but I’m not any bigger than I was on my last period (which came exactly when it was supposed to). The guy I had sex with asked me for the first time ever (which is over 5 years) when my fertile time was, which struck me as odd, because usually I can tell if he ejaculates in me, and I didn’t feel anything-and because he never asked before. However, I noticed that he’s started producing a lot of pre-ejaculatory fluid, which was never a problem until recently. Now I’m so confused. First of all, I had a bowl of rice last week and it gave me diarrhea (that’s never happened before, plus don’t starches normally constipate?), and I’ve had diarrhea pretty much everyday since then-once when I hadn’t eaten anything. I had a chocolate candy bar that gave me heartburn, but 2 hours later I wolfed down a double cheeseburger platter with no problem. I feel borderline nauseous at various points, and I have indigestion (a fajita I had 4 hrs. ago feels like it’s just lodged in my throat, and it won’t move). I’m having cramps, but mainly on one side and in a different location and different type of pain-sometimes it gets centered in the middle of my belly, which I don’t recall happening before. Last week, I had the most terrible headaches everyday-they’re still here, but not as bad. Also, last week and the week before that, everything made me cry. I was watching MTV, and I just burst into tears, but the crying only lasted for 2-minute spells. Even, I can’t explain that. I usually have a crying spell a couple of days before my period, but it lasts for about 30-min. and it only happens once. Plus, if it were PMS, my period would’ve been here by now. I don’t know if any of these are symptoms or not. Please help!