It is still only so Early, I would retest in 2 + weeks if You're eager to find out a blood test from Your doctor may be the best bet as it can show up within 7 days but You will not find a urine test that will show up this early. You're only 2 days over Your period. It is hard to imagine You would experience all these symptoms so early although it is possible.
These can be an oncoming period symptom though each time You miscarriage your period cycle does change as You would know and the symptoms of one coming on seem to worsen
As it has been 3 days since you tested negative, you could test again today or tomorrow! Or if its still negative and your period hasnt returned, try another test in a week!
Those are my symptoms when expecting my period.
I get headaches, shooting pain in my boobs and i get extremely nauseous.
I'd retest in two weeks.