I have on many occassions stopped my
warfarin for medical procedure reasons. I take only 5 mg a day. So,
in my exlperience on can stop "cold turkey" without any problems other than an increased chance of blood clots and storke. I have several risk factors, oncluding permenant AFib, so I have no choice. I do not have many side effects from Warfarin, but I am on less than half the dose you are taking.
Do discuss with your doctor at your earliest, surely within a week or two.