I Have Been Undiagnosed For Over A Year And A

I have been undiagnosed for over a year and a half with overwhelming fatigue (12 to 30 hours later) after doing normal activities. I have a cough with chest constriction; although I have clear lungs. Joint aches, skull pressure in the top of my skull, congestion behind my ears, and thymic hypersplaysia. I have had stress test, heart cath, pulmonary tests, nerve conduction tests, tick panel, and did test positive for Rocky Mountain Spotted Fever. I have taken 2 weeks of doxycycline with no improvement. I don't know where to turn - help!