14 days late but negative HPT

[ErinSheppard]

I was supposed to have gotten my period 2 weeks ago. I have done 3 different HPT but all came back negative. I have had some symptoms such as about a 2 weeks before my period was supposed to start I had very light spotting, not enough to use a tampon or light panty liner it lasted about 28 hours and stopped. Since then I have had continuos light cramping/pressure in my lower abdomen. This week I have been getting nauseous/vomiting but it's not been in the morning it's more toward the evening. I have also had a continuous milky discharge. I'm very confused about what I should do. Someone please help!!!