Lipase wk 1: 30 (16-120), wk 2: 15 l (16-120). Is this indicative of cystic fibrosis? No other symptoms.

Are you symptomatic? Isolated lab results (particularly essentially normal ones like the lipase levels you describe) are relatively meaningless unless taken in the context for which they were ordered. As a child, was cystic fibrosis suggested as a possible diagnosis? Why are, and what makes, you concerned regarding this disease? More specific testing is appropriate if suspicion of CF is warranted.