Photodynamic Therapy and BBL for precancer lesions and AK?

I'm a fair skinned, freckled person. Over the last eight years I have been moderately aggressive with skin care. I know have a fraction of the freckles on my face. Despite BBL, Blue Peel , hydroquinone and retinol products I have two age spots that will not go away. I'm scheduled for PDT next week on face, chest and hands. How close before or after can BBL done to PDT for optimal results? Also, if patient has a history of Fever Blisters do you treat prior with Vamfir? Thank you