in one's feelings

Adjective

US jargon not-comparable

(US, African-American Vernacular, jargon) Overreacting or having a strong emotional reaction; worked up.

Japanese Meaning

感情が昂ぶっている、すぐに取り乱す状態にある / 過剰に反応している、些細な事に大きく感情を表している

After a breakup, it's normal to be in one's feelings for a while.

別れの後は、しばらく感情的になるのは普通です。

Sense（1）

(US, African-American Vernacular, jargon) Overreacting or having a strong emotional reaction; worked up.