4 days late

Hi all I am new to this and not sure if people here are still active. So my last period was October 11,2017. I am 33 days cycle and normally would get cramping and pms symptoms a week or two before period comes but I only got them on Sunday and Its only very light, cramping comes and go but have a very sore/tender breast not so much on my Nipples although I feel a little tingle every now and then. Also on Sunday I felt really nauseous and dizzy that had to stop what I was doing and actually had to sit down. This goes on until today, and had the worst nausea yesterday and had to keep going back to the toilet. And now November 15, 2017 I am having mild cramp that feels like period. But still feel a little dizzy. So I went to the doctor yesterday and checked if my iron is ok(result is normal) doctor said that it might me too early for me to test but I still test and came back negative :( but my period hasn’t come yet and still feel very dizzy, fatigue and cramps with the sore boobs. Could I be pregnant by the way

We had sex on my fertility window and on my ovulation day.

Please someone help me. This is si frustrating 😔😔😔