Here are my symptoms:
*Late period
*Increase cervical mucus -clear (looks like what it would be like during ovulation)
*constipation
*random stomach pains
*I had a 2 days of light bleeding about 2 weeks ago
*usually my breasts are tender about 3 days before my period starts and they have not been.
Again, I did take a pregnancy test when I was 2 days late and it was negative. Does anyone have an idea of what could be going on?

It is way too soon to take a pregnancy test.

Periods can be off a few days, or even miss a month, for no reason sometimes. When your period is two weeks late test again using first morning urine. If still negative, wait to see what happens next month when your period is due.