我怕想太多心脏碎掉
[wŏ pà xiăng tài duō xīn zàng suì diào]
It implies 'if I think too much my heart will break.' Sometimes there may be pressure and stress in life that makes us overthink everything, which can have a significant impact on physical and psychological states, like 'overthinking breaks the heart'. This phrase expresses a sense of helplessness, confusion and even pain.