Sometimes when ending the sound r (rhotic), I try to put my tongue back in position or ready it for the next sound and I would accidentally make a tapping sound when the downside of my tongue hit the area behind my lower teeth. Like when I say "your leg" quickly, I would accidentally make this sound right at the start of the sound /l/ in "leg". Is it normal? Because I can't help it. Sometimes I do this when pronouncing "girl", too.