Hi I'm a female who is experiencing lightheadedness and stomach pains. This just started happening. Yesterday I got this sharp pain in my stomach and it went away when I used the restroom. Today, my stomach felt grassy and I used the restroom and I had diaihiera and it burned this crazy. I've had stomach problems before when I was younger. Also, I can be pregnant because I just got off a very heavy period at it was on time.