Thank you for posting your question here and I will try to answer it as best as I can.
The bruising can be either because you have thin skin, but if that was the case you would already know about it, having had the condition your whole life.
So it cant be that, bruising so easily is a sign that there is something wrong with your clotting system, this could be several things like thrombocytopenia
Go to you doctor again and ask them to run your blood work to check what your thrombocyte level is. In the meantime avoid physical activity that can cause bruising as much as you can. Once again see a doctor as soon as possible.
I hope this answered your question.