Terrifying experience with 36mg: HR spiked to 187, now having weird chest sensations. Has anyone experienced this?
I was on 18mg of Concerta for two weeks. Three days ago, my doctor bumped my dose up to 36mg because the 18mg had no effect.
The new dose was working perfectly. Oddly enough, during the first two days, I didn't experience any severe side effects—just a slight, expected increase in my resting heart rate. But yesterday, something terrifying happened. My heart rate suddenly spiked to 187 bpm according to my Apple Watch. It felt really dangerous and was extremely alarming. I immediately stopped taking the medication after that.
However, there is something else that is seriously worrying me right now. Today, I’m feeling a weird burning sensation in my heart area (specifically around the left nipple), or like my heart is fluttering and something is moving in there. This is happening even though I completely stopped the meds and haven't taken anything today. The feeling comes and goes at different times of the day; it's not constant.
Guys, I am honestly terrified. Are these just lingering side effects from the medication that will eventually fade away, or could my heart have sustained some sort of damage or glitch after being severely exhausted yesterday? Any advice or similar experiences would be really appreciated!