Bubble tea during pregnancy?

I feel so guilty almost everyday I’m tempted with caffeine and weirdly I have craving for caffeine. Like Frappuccino , bubble tea , chocolate been surviving on them for past 3 months because if I take anything else I’ll puke so I try to stick more towards diluted milo kosong. If bubble tea I’ll ask for less tea and more milk and more ice. I guess once in awhile is fine???