What is your experience with caffeine?

I feel like every time I have caffeine my body reacts differently, sometimes it helps me focus, sometimes it gives me energy, sometimes it makes me sleepy lol. But my biggest question is does anyone else feel like caffeine makes them stim like crazy? My vocal stims especially are through the roof if I have too much caffeine. Curious if anyone else experiences this, or if it’s maybe related to my cyclothymia (mood regulation disorder).