Skipped Period or Pregnancy?

I am having some normal period symptoms, but also some symptoms I have never experienced before and my period is about 8 days late. I have tested a few times and all come back negative.

The symptoms are:

- cramps

- back pain

- nausea

- constipation

- body odor (I usually have to only wear a little deodorant, but lately I can't even go to sleep without having BO)

- headaches

- dizziness

- boob & nipple soreness

- clear somewhat sticky discharge

- fatigue (I am tired allll the time lately)

Even though I am testing negative, could I still be pregnant or do you think it's just hormones/stress making symptoms worse?