Are you taking it for anything specific and did you have digestive problems prior to taking it?
You have possibly increased too fast. I would cut back to 6 drops or so once a day
or even 2 times 3 drops or similar amount and then wait till you see improvement in the symptoms, or go less if you feel you need to, but best to continue with a little if you can
Sounds like you have wind pains. Is that what it feels like?