FVL Hetero stuck with Warfarin

Question for my arterial clot survivors, I have FVL Hetero with a strong family history of clots. Recently following brain and spine surgery I suffered numerous venous thrombosis in both arm and one arterial clot in my left arm. Hematology bridged me from Lovenox to Warfarin. I am very stressed about the warfarin with all of the INR’s the unpredictability, and because one week after starting my liver enzymes for some reason shot through the roof. My hematologist insists that warfarin is still the preferred treatment for now because of the arterial clot. It’s been 4 weeks post up and even with neurosurgery giving the go ahead for eloquis hematology will not budge. I had a UA for blood in the urine and colorless but bruised feeling lump in my arm. I am worried about bleeding under the skin but getting the brush off. Curious if anyone else has ever been told that warfarin is the preferred treatment for arterial clots? Thank you.