Razor bumps!! Help!

I recently shaved down there like normal and now these 2 really painful razor bumps appeared on my lips. It hurts so bad that I feel the pain when im wearing underwear. Also when the razor bumps appeared.. I got a burning sensation when i have my vagina outstretched???? Makes no sense so i googled it and it said it could be an infection. This has never happened before ? Can someone give me some advice how to make the pain go away?