Thank you for your query at DoctorSpring.com
There is very little information in terms of investigations for suspected connective tissue disorder. It points towards a connective tissue disorder from the history.
I would request you to get Vit B12, Ferritin, serum Iron status, ANA by immunoflourescence, C- Reactive protein levels, ANTI CCP, Rheumatoid Factor, This would be minimum on which we require to build our case.
It takes one working day to get all the reports. In all probability to rule in or out connective tissue disorder would be high on priority.