VETSCOPE

Hi. I was just wondering. I noticed that my dog is coughing. Like something's stuck on his throat. But he I only caught him doing this a few times. He did it again when I picked him up. But he is still eating well. Lively. He does sneeze before but this is the only time I heard him cough. He is vaccinated and dewormed and treated for ectoparasites. He also takes his vitamins. He always stays at home and rarely go outside our house. So i dont really know whats wrong. What could it be tho? Please help. Shpuld I bring him already to a vet or is this normal? Thanks.