No no, don't do that!! A lot of us, myself included, have had our anemones shredded by a PH and they ended up fine. Give it some time. An anemone will turn insideout when it is not happy, if it stays inside out it could be dead. A dead anemone will not poison your tank as say, a cuke or nudibranch will, but it will release ammonia, same as any dying critter. It will also smell like axs when it's dead, so give it some time, see what happens.
My anemone finally found it's happy place dead in front of a PH's flow, so aim a PH at him and see if he sits still. He may be going after more current.