Laura,
Sad story...very sad
Was it a Harlequin sweet lips? Or a Two striped Sweetlips?
Wondering what kind of anemone do you have? Is is one of these mentioned in this site?
Sea Anemone Species: Sea Anemones, Bulb and Carpet Anemones
I understand that the Harlequin are difficult to acclimate and feed. We were going to get one until we learned that they grow to 27 inches, too big for us.
You may want to plan and observe for an extended time any new fish you introduce... Are the clowns bullies, or peaceful? What type are they? Have they bonded with the anemone?
Please accept my heartfelt condolences for your sweet lips.