what could be causing leg pain and burning just to the right of shin bone?

I visited my family physician and told him of a pain I developed in my shin (immediately to the right of my shin bone) which feels as if it is burning.  It feels like a shin splint would feel but hurts most when I elevate my leg not while I'm walking.  The pain is intermittent and will feel better when I wake up in the morning and feel okay during the day while I'm working but when I get home and put my feet up, the burning pain starts and doesn't subside until late in the evening.  In the past, the pain has lasted for as long as a week and then subsided for a week.  Recently, it started again.  My doctor ordered some blood tests to determine if the cause was from my medicines or a possible clot.  The determination was no.  I'm taking armour thyroid and estrogen.  About 2 1/2 years ago, my dr. prescribed daily aspirin therapy as well as 2,000 mg. fish oil and B100 .