I felt secure when I was taking an anticoagulant, and now feel worried about having another clot, now that I am off my anticoagulant.

This concern is common, and you should discuss your worry with your doctor. Try to concentrate on your freedom from taking pills that need blood testing. Doctors base the decision to stop anticoagulants on many factors such as what caused your clot, where it happened, and what your personal and family history of clots is. There is a lot of thought in their decision.