Ive just come back from spain and heard that i need to get tested, i gave mild sore throat?

Depends on details: COVID-19 pandemic at this time, so a doctor on video may be safer than an in-person visit. Sore throat can be from a strep throat (antibiotics needed), a cold or influenza, or from some other cause such as allergies. Sore throat is less common in COVID-19. Usually, a person sees a doctor (but call first) if the sore throat is bothersome, recurrent, or doesn't go away quickly.