I HAVE HAD A SORE FOOT SINCE CHRISTMAS. IT STARTED

I HAVE HAD A SORE FOOT SINCE CHRISTMAS. IT STARTED IN MY ARCH. I THOUGHT IT WAS FROM STANDING TOO LOMG ON ONE FOOT. IT GRADUALLY GOT WORSE AND WENT INTO MY HEEL. NOW IT USUALLY DOES NOT HURT WHEN I AM SITTING BUT WHEN I STAND UP I CAN HARDLEY PUT PRESSURE ON IT. AFTER I LIMP AROUNDFOR A BIT IT STARTS TO GET WHERE I CAN WALK ON IT, IT STILL HURTS BUT I CAN LIMP AROUND. I HAVE TRIED 2 NEW PAIR OF SHOES AND ALL KINDS OF OINTMENTS, SOAKING HOT AND COLD. HERE IS THE WIERD THING.SOME DAYS IT BARELY BOTHERS ME. I CAN GET UP IN THE NIGHT AND WALK AND THEN I REALIZE THAT I DID NOT HAVE TO HOP AROUND. I AM VERY COFUSED AND AM STARTING TO GET A LITTLE SCARED.PLEASE IF SOMEONE CAN HELP.