Whenever i practice on my trumpet it seems like that whenever i press down the second valve it will make this sound like air is leaking. All the other valves don't but it's just the second one. It started after i decided to switch from a D shaped tuning slide to a more curved one, if you know what i mean. Anybody got any advice on what i should do? I'm thinking of taking it to a music shop some point next week when Christmas break starts.