Movement Disorder

My 18 year old daughter started experiencing tremors.  They began tremors in her right arm lasting about 1 hours.  After 2 weeks, returned in right arm for same time.  2 weeks later, she now has significant tremors in her right arm and leg.  The episodes last anywhere from 1-4 hours.  She has had an CT scan, MRI and several blood tests, all are normal.  She has been taken off oral contraceptives for about a week with mixed results.  Tremors seem more frequent, but less intense.  The other key fact is that she had Lyme Disease over the summer.  There was no question she had the disease as she had the characteristic bullseye rash, joint pain and fever.  She was put on Doxycycline and 3 days later Amoxicyline.  At about week 2-3, while on vacation in Cancun she was not diligent with her antiboitics (taking only 1-2 doses per day verse required 3) and relapsed with fever and joint pain.  We got her back to three doses a day and finished all the antiboitics.  I question whether her movement disorder may be related to Lyme Disease which although treated, she may not have originally been cured.