Light headed and numbness

So if I stand more than 5-10min I started getting black fuzziness everywhere I look, my heart starts racing, it's harder to breathe, I get very hot and clammy feeling, my mom says I go completely pale and loose all color in my face, my lips and finger tips go numb and tingly, and I have to sit immediately before everything goes black. I'm kinda nervous as to what this could be, I'm making a call into my OBGYN office in the morning but until then has anyone else experienced this? I've heard of dizziness but I feel as if this is kind of different and it scares me. Any opinions or stories of the same thing will help. Thank you!