is it possible?

I'm 7 DPO or at least that's what glow says (I've never taken an ovulation test). I had sex 5, 4, and 1 day before I supposedly ovulated. Today I've just felt off a short period of time I felt really nauseous and I've been crampy on and off the past two days. In your experience is it possible to have pregnancy symptoms this early? I read the day by day two week wait pin on the TTC board and it says you don't feel symptoms until like 9 or 10 DPO. Just wondering if I'm making this up in my head or if any of you have first hand experience having actual pregnancy symptoms this early. Thanks!