Metallic Shadow Person?

Sorry this story won't be as long as my previous ones!

I just had a situation happen that's not that scary, but I'm confused about and I'm just a little concerned since I was followed around for 6 months. It happened at work about an hour ago. I work at a call center and everyone has their own computer and sections dividing the computers. The height of the sections are about as tall as my waist so you can easily look over yours to see your friends!

I work for Google and I was on a phone call when suddenly I just felt really drained and weak. Keep in mind that I do love my job and company and don't feel any negativity at my work place. I know that being negative a lot could attract unwanted guests, so that's why I mentioned that I was in a good mood. I saw something at the corner of my eye but I didn't want to look over since I was reading something to help my customer. I couldn't feel my body. I could feel my inner self struggling to stay moving. I couldn't focus on anything and my brain just wasn't there either.

My coworker (let's call him Will) stood up really and looked really confused. Will told me he saw a shiny metallic figure standing next to me leaning against my booth. He said it was a solid grey figure and about 5'8. I wasn't able to see when it came up to me, but Will was and apparently it just walked up to my booth, leaned for a while, and left. I got a happy feeling from it but it's been an hour and I still feel very weak even after eating. I slept well this morning and woke up rather late so I should be full of energy.

Can anyone help me or tell me what it was? I have never seen anything metallic.

Thanks for the help and Happy Holidays!