Right front tooth pain when i touch/rub my nose, been to the dentist had x-ray done no abscess presents,tooth was perfectly healthy could be sensitive?

Get 2nd opinion: Just because nothing was seen on that X-Ray,does not mean you may not have a tooth problem! See an Endodontist for a thorough exam of the area,including new radiographs at different angles and pulp testing of the sore tooth!

Pain: Could be from fracture of tooth or surrounding bone, traumatic injury, neurologic cause, etc. see an Endodontist, a tooth pain Specialist.

See Endodontist: Diagnosis can be challenging and complicated due to pain from one tooth may be referred from another tooth or from other orofacial structures. Endodontists are trained to differentiate between pain of endodontic origin and non-ondodontic pain.

Sinusitis ?: Sometimes inflammation of the sinuses can result in sensitivity of maxillary teeth. In addition, radiographs to not detect if the tooth is vital or non-vital. Did your dentist test to see if the tooth is alive? Seek a second opinion from an endodontist for peace of mind.

Mystery pain: In agreement with my colleagues. If all else fails, see an Endodontist who can take a CBCT (3D radiographic image) which may show something the routine 2D x-rays do not. Get a second opinion. Usually these types of mysteries either go away and don't require treatment, or worsen over time and the diagnosis becomes evident.