What does "come and go" mean?
"Come and go" is an expression meaning that something arrives and then leaves again: it is transitory and only is present or exists for a period of time. The speaker says "they came and went" to refer to a "few months." Thus, we can understand this to mean that "[those first few months] came and passed by." Ex: Fashion trends come and go, so I like to buy more classic pieces. Ex: Friends come and go, but family is forever.