I had sex 6 days ago and today I had some brown blood that turned a light red like spotting and cramps that are mild. My period isnt due for 2 weeks?

Ovulation? If your menses isn't due for 2 weeks, you are mid cycle and likely having mid-cycle pain and spotting associated with ovulation. In this case, pregnancy is unlikely and the pain and bleeding are not likely related to the sex 6 days ago. You should expect your normal cycle when expected. If not, you have irregular cycles and should see your doctor.