Fully erupted wisdom tooth feels weird. no pain, just weird. i was curious so wiggled it with my hands bit its very hard. should i worry?

Wisdom teeth: not always cause problems. If there is enough room they will usually come through like any other teeth into a useful position and cause no problems. Moreover, sometimes these teeth can be a valuable asset to the mouth when healthy and properly aligned. At your next hygiene appointment request panoramic x-ray to evaluate structures that are surrounding your wisdom tooth.

Sorry: "Weird" is not enough of a description on which to base a diagnosis. Please see your General Dentist. Have the tooth and surrounding tissues examined and probably x-rayed. If pathology is present your Dentist will discuss treatment or referral with you.