Sore Legs?

I had an intense work out on saturday on my legs, first time in about 2 weeks. Now they are so sore I cant even stand up or walk with out my legs giving out. I know the pain is a good thing but I got to walk. My knees just buckles in and I walk with a wobble. What can I do to ease the pain? I already tried heat pads and hot showers. The only time I do not feel pain is when I am sitting down or have my legs up.