Hello. Welcome to Ask The Doctor.
I have read your query.
I understand your concern.
Petechiae can be because of many reasons including deficient platelet count, abnormal platelet function, clotting factors deficiency, drug rash, vasculitis.
Vasculitis can be localized to skin only or may have systemic involvement.
A clinical examination of Petechiae is required followed by investigations to make the final diagnosis.
if your doctor suspects vasculitis, then he might take skin biopsy of the recent most lesion and send it for histopathology.
For other bleeding disorders mentioned above, you need following investigations:
1 ) Platelet count
2)PT / INR
3)Bleeding time and clotting time.
If any issues are found in the report, you would be investigated accordingly.
As far as your other symptoms are concerned, they don't seem to be related.
They can be due to anxiety, anaemia, Calcium and vitamin D deficiency.
I hope it helps.
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