I am 6 weeks delayed.. But I test pregnancy its negative.. What can I do ?

Check out Planned Parenthood or your local health department for leads to the free medical care. Some areas have charity health clinics.

Sometimes periods are delayed if you do not have enough nutrients, and sometimes pregnancy tests are wrong.

Also, there is a possibility that your hormone levels are simply too low. You will need to get tested and some clinics have the ability to do a diagnostic sonogram for free.