What you are referring to is Coprolalia-which is a rare form of Tourette's.
As someone who has had Tourette's since she was a little girl, I can assure you it isn't something you wonder whether you have or not. Also, one can only have "full-blown" Tourette's. There is no semi-Tourette's. No convenient Tourette's that is polite enough not to show up at interviews.
A person can control their tics in the same way someone with OCD can control whether they turn the doorknob thrice to the left before entering a room. There are times when they will, for the most part, disappear, and others when they are so bad I worry whether I'll ever stop. Because you have to continue until the tic is complete-you cannot stop until it feels "right".
In order to be diagnosed with Tourette's Syndrome, you must have both a motor and a verbal tic which have been present for more than a year. Most have symptoms surface when they are quite young.
You appear to simply be under a lot of stress.
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