Sick, any clues?

Mariah • Nerd. MCU <3
So I've always had an issue going #2 since I was a toddler..my intestines don't have the muscles to push things through regularly.. Anyway so every so often it builds up and makes me sick. Which is what I thought this was. But I took laxatives and emptied out 3 days ago. And I still feel nauseous. Also I have what feels like motion sickness and I get dizzy when I stand up. I don't have a fever. Eating is pretty much a no go. I don't vomit but I get very bloated... Any clues??