Hello,
There are several potential causes of excessive bruising with minor injuries, including medication side effects, bleeding disorders, and underlying health conditions. Since you are not on NSAIDs or anticoagulants, and von Willenbrand's disease has been ruled out.
Other possible causes of your symptoms include:
* Autoimmune disorders: A positive ANA can be an indicator of an autoimmune disorder, such as lupus or 
rheumatoid arthritis. These conditions can cause bruising and fatigue.
* Vitamin deficiencies: Low levels of 
vitamin C, vitamin K, and other nutrients can increase your risk of bruising easily.
* Platelet disorders: They are blood cells that form clots and stop bleeding whenever there is a lesion or a wound. If you have a platelet disorder, such as idiopathic 
thrombocytopenic purpura (ITP), your 
platelet count may be low, which can cause excessive bruising.
* Liver disease: Liver disease can affect your body's ability to produce clotting factors, which can lead to excessive bleeding and bruising.
* Thyroid disorders: 
Hypothyroidism, or an underactive thyroid, can cause fatigue, weight gain, and easy bruising.
* Cancer: Some cancers, such as 
leukemia, can cause excessive bleeding and bruising.
Given your symptoms and medical history, it's a good idea to follow up with a 
rheumatologist as scheduled, as they can help to determine the underlying cause of your bruising and fatigue. In the meantime, try to avoid activities that could increase your risk of falls, such as walking on uneven surfaces or wearing shoes with poor traction.
You may also want to consider discussing your medication regimen with your healthcare provider to ensure that none of your medications are contributing to your symptoms.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Shah Hussain, General & Family Physician