My first day of my last period was 10-16.. I had unprotive sex on oct 28th and he nuttin in me... I'm starting to cramp in the lower part of my stomach I also have white discharge.. I've took hpt and had a blood test at doc on last week and all came back negative could I still be pregnant

If you had sex at the end of October it may still be way too soon to tell. Didn't the doctor tell you that when you had the blood test done? The cramps and the discharge may just be pms before your period. Although keep an eye on the discharge and if it changes colors or begins to smell you should go back to the doctor in case it's an std or infection. You'll have to wait and see if your period comes or not. If it doesn't, I would try another test in a week or so.

You could pregnant use a condom and close your legs