If i go to the hospital how will they determine if i have a dvt or not?

Lab test and US: Best way to rule out a DVT is a duplex ultrasound of the vessels of your affected extremity. A d dimer test can identify breakdown products of a clot and can help eliminate the need for an ultrasound.

Ultrasound: The first test used to determine if a significant deep venous thrombosis is present is an ultrasound test of your lower extremities. Blood tests for "d-dimer" can also give an indication of too much clotting in your veins. The "gold standard" test, injecting die in the veins to take x-rays of the veins (venogram) is done less often, because it carries a small risk of causing dvt.

Diagnosis: They will usually do a venous ultrasound

Venous Doppler.: The physical examination of the leg is notoriously inaccurate for the diagnosis if DVT. In the appropriate clinical setting (immobilization, recent surgery), a venous Doppler would be the necessary test.