>eat fast food all the time and unhealthy stuff
>thick, pleasant, non-messy shits
>once a day
>eat healthy food
>constant stomach cramps
>why can't I stop farting?
>have to be in the bathroom for 15 minutes every 2 hours or so
I found this out too OP. Most likely that you're eating too much fiber. If this new diet is still very much new to your body give it time to adjust, otherwise cut down on fiber or space it out. I find that eating oats/beans/bread too much made me shit like crazy