Up on my feet

For over a year of being a staff nurse, I can feel that prolong standing during my shift is taking its toll on me. At the end of the shift and as I kick my shoes off my feet, I can feel the heaviness of my legs. I have tried wearing full support stockings but they just give little help. I think I need compression stockings more than the pantyhose that I use. I do not want to end up having spider veins on my legs or worse, developing deep vein thrombosis which is fatal.