Pregnancy symptoms? Or delayed period?

Mira

So supposedly my period for this month should start last week on the 20th…. However, until now I still don’t have my period. I had spotting on the 17th that was just 1 time(which I thought the start of my period). I have few symptoms! I feel nauseous every time I eat, I get dizzy, very bloated, headache, back pain. I have been craving for spicy fried chicken and chocolate cupcake, I am being more sensitive, I always feel sleepy. We are actually hoping for a good news that I might get positive after months of trying to conceive. As you can see on my calendar does this delay a possibility of pregnancy? Or my period might be just delayed.