Have you been eating a lot more coconut oil?How about cabbage?
Most people work their way up in the coconut oil department as it can be an adjustment for your body and many/rapid trips to the toilet are very common.
Also,if you have increased cabbage(especially for me),this can cause cramping,watery stools,etc.
It will pass,no pun intended.

Coffee would have been my next avenue.
It could also be your body detoxing in a whole 30

Without having any information about what you've been eating, it's hard telling what the cause is, exactly. Here are two theories I have:

1. Your fiber intake is way up from what you're used to. Too much fiber will cause the runs, too, especially if you're not used to a lot and suddenly jump it up. If this is the cause, it'll clear up in a few days as your body adjusts.

2. You're eating too much protein and not enough carbs or fat. Too much protein and not enough carbs and/or fat can cause the runs, as well. If your carb intake is coming from non-starchy vegetables and not much fruit, then your carb intake is likely way down. If you're avoiding/minimizing fat on top of that, then you're setting yourself up for trouble, and this one won't go away on its own. Don't avoid fat. Instead, make liberal use of it. Coconut oil, ghee, and animal fats are all Whole 30 approved, so make use of them, especially for cooking. Olive oil is great for salads, but shouldn't really be cooked with too much (it can withstand some heat, but saturated fats are better in that department). It sounds like you could use more fat in your diet, anyway. Fat is a hugely valuable source of fuel for a hundred different reasons. Don't avoid it, embrace it.