Omg- what was this? Vision went black and I felt like ping out?

Okay, so I was just doing some summer work when my stomach started to ache, so I went to go take a shower to calm my stomach or whatever. After that, I went to go make breakfast, but while I was ering my waffles (lol) I started getting really woozy, and like I was seriously gonna p out, so i was just like trying to focus on my making my breakfast, but i was like having trouble standing up. and then my vision started to black out until I completely blind. I dont know what happened next, all I know is that I walked a little bit to the table and ran into a lamp and knocked it over. After that my vision started coming back, and i just ate my waffles. My head still feels like someone microwaved it, but my vision is fine. Help :(