I am a mother of two I was pregnant with my daughter 10 weeks along and it didn't show I was pregnant until then with blood or urine tests. My son I was 14 weeks along and it did not show with blood or urine testing either. In some cases there is a chance of having what is called "rare" pregnancy , in which it may or may not show on normal tests the only for sure way to know at this point is to schedule an ultrasound with your OBGYN so you will know for sure I hope this helps for future questions>
I have not been on birth control.
If u just recently got off birth control it could happen
It could be a number of things. Have you changed your diet or are you pretty stressed??? You'd be able to test positive now if you were pregnant, especially by the doctor. Just wait a bit longer and see if it comes.