Attention Insulin Pump Users..

So I haven't had my pump very long

but I am just curious to all of those pumpers out there,

When insulin is being pushed by the piston

can you here it kind of clicking?

I notice this in the morning and when everything is super quiet but 

is this normal?

I keep forgetting to ask about it but 

I haven't dropped it or anything and 

my numbers keep looking fine.

You just normally don't hear your device

making noise unless it's not working correctly?

Thanks for all the help!