I had a blood clot 6 month ago, over last 2 months IV been gettin terrible pins and needle like cramp in my leg when im relaxing?

Post-thrombotic snd. The first concern is that you may have a recurrence of your clot, however more likely you now have some degree of venous insufficiency -- damage to the valves in your veins from the clot. This is easily treated by compression stockings, but you will need an ultrasound first.