Yes, when my anxiety is at its worst I have to run to the bathroom several times in the morning and my stomach
just churns and churns into knots
. It is most certainly related to anxiety, for some it's headaches, others its their hearts, and for some a combination of all of those things. Our bodies certainly suffer from our anxiety and seem to work overtime.
Hang in there, as you get a better control on your anxiety the trips to the bathroom will decrease.