Menstrual cycle lasts between 32 to 33 days in between. last month it came early (24days in between). im a week late. 3 neg test could i be pregnant?

Menses: The average adult menstrual cycle lasts 28 to 35 days, with approximately 14 to 21 days in the follicular phase and 14 days in the luteal phase. There is relatively little cycle variability among women between the ages of 20 and 40 years. In comparison, there is significantly more cycle variability for the first five to seven years after menarche and for the last 10 years before cessation.