Thank you for your query at DoctorSpring.com
I went though your reports. They are in spanish, but I could decipher it to my possible extent.
I dont think there is anything severe to bother about. I would recommend not to have a course of empiric antibiotics further without any evidence of infection. However, there is always a possibility of unidentified zoonotic disease (in view of the pets that you have). They may or may not be a reason. I am not sure about it either.
If the physician could find no other obvious reason for your problem, can we work on probably eliminating the unidentified cause ??
I would suggest you to plan some weeks / months off the pet animals if possible and see if your symptoms become better.
Please let me know if you have any additional concerns. Please attach if you have done any scans or imaging.