I have a feeling when i walk that someone is holding a finger on the inside of my shin, the feeling of pressure stops when i stop walking but when i start walking again it comes back, what could this be?

Never entrapment or peripheral vascular disease(PVD) but unless you smoke or have severe lipid problems not likely PVD. Time to see a Dr I would think.

As you can notice, many possibilities. Common muscle overuse injury is to the tibialis posterior muscle and tendon due to over pronation Try wearing a supportive shoe . see a podiatist for exam diagnosis and treatment