I don't know what I came these days?

I don't know what I came these days?

我不知道这几天我怎么了

我不知道我这些天该去哪

"我不知道我来到这几天"
"came"是"come"的过去式，"those" adj. 这些的
也可以这么说：I don't know that I came to this for a few days ，当然你的说法更简洁一些，不用悬赏，有好多在线翻译的网站，一搜就知道了。