@amm97 - Is there any chance you could have celiac disease?
CTs and MRIs normal, but abnormal biopsy of small bowel or antibodies present. Check with your primary doctor for this. There could be weight loss with this too secondary to malabsorption.
Don’t go gluten free now- if biopsy is needed, it will alter the intestinal mucosa.
Still consult with another vascular surgeon.