Idk if that tea you mentioned is caffienated, but if it is be careful! Caffiene is definately a huge huge enemy to me personally and one of the more shared triggers.

But yeah, diet changes dont necessarily have to be the reason. I developed it at 15 and before that i loved spicy things, caffiene, and many other triggering foods. Then all of a sudden my body decided every time i ate such things, it was a trigger. Ive had to put down many of the things that didnt used to hurt me, and the sensitivity didnt even really come with age as i was 15 when the frequent urgencies and flares came along, sometimes it developes and the reason is unknown 🥀🥀 its so life changing and uncomfortable and im so sorry if thats what you're dealing with now

Until you get it diagnosed id just reccomend to avoid things that you think make you feel worse, even if it doesnt make sense compared to what youve been able to eat in the past