TTC #1. PMS-like symptoms at 5dpo, now 12 dpo, and no PMS at all?

've had a perfect 28 day cycle, so I should be getting my period this Sunday. 5 days past ovulation, I was bloated, cramping, had pressure in my lower abdomen, and a lot of other PMS symptoms, but of course, no bleeding. I normally PMS 3 or 4 days before my period. But, here I am 2 days before I'm expecting it, and nothing at all. I'm not stressed out or anything, so that shouldn't be a problem. Plus, I just had to go wipe because I leaked cervical mucus randomly. It's really clear, with a few white clumps. There's no chance of STDs or anything like that. So, could this be my month? Could I be pregnant? I have been really, really tired. I could barely make myself make Thanksgiving dinner last night, and I slept til past noon today. And my nipples have been hurting really bad for the past few days, and I feel like I need to use the bathroom, but I'm constipated. Any advice would be appreciated. Thanks!