Late Period or Pregnant?

My period is only 2 days late, which is completely normal for me since my cycle is irregular. I took a PT & it came out negative! 👏🏼🙌🏼 But usually I have signs that I’m about to start, this time is completely different! My body feels strange, I’m super gassy 😷, I’m getting strange cramps in various parts of my abdomen, the smell of certain things makes me incredibly nauseous🤢, and I keep getting sharp pains the middle of my back😣... all of this accompanied by migraines 😓. Are these things normal for a late cycle or could I be pregnant??