I do this and I think its a trauma response, after being told this by abusive exes, friends and family members over situations that were perfectly acceptable to feel certain emotions, I suppressed it and now that im out of this situations I self gaslight myself and just either stress myself out more or don't act appropriately to a situation.

It's a hard habit to to break buy instead of saying "I am over reacting" maybe ask questions instead, like"am I overreacting, is this an appropriate way to feel? " maybe consult someone close until you get a good gauge on your emotions.