Can't incur a doctor's bill in the US unless you go see one...they're just not very good at preventative medicine, so you're best off waiting until there's something very clear for them to treat IMHO. Or you just might get treatment/diagnosis for something you don't even have.

Cardiologist visit: 600 bucks for 20 minutes + 80 bucks for EKG administered by assistant.
Insurance picked all but $50.