What Causes Large Bruise On Shin Along With Swelling In Ankles?

I have mild Von Wiliebrand s disease. 5 days ago, while I travelled a very long distant via 23 hours of flight time, I had a headache and the only medication available to me is aspirin. I took 650 mg of aspirin. A day later, I started to see random bruises on various part of my body that I am not very concern about. There is a huge bruise on my left sheen I can feel it days ago, it slowly grew larger and covered 2/3 of my sheen and travelled down to the foot. On the inside bottom of the foot it turns purplish black. The left ankle looks mildly swollen, that it looks like I had twisted my ankle. Do I need to worry about DVT? Or this is the bruising process that causing the swelling and bruise at the bottom of foot?