This sentence has several potential meanings, but I think the most likely is 'I don't understand, either.' Jibun, meaning one's self, can also be used as a rough personal pronoun along the lines of 'ore.'
omoi, nentou, kokoro, seishin, maindo, munesanzunKokorodepends which mind in Japanese heart and mind are the sameKokoroi changed my mind = Watashi wa jibun no kangae o kae ta
Uchi naru jibun
You may say 'jibun ga suki,' written: 自分が好き
'Today I will talk about myself' is今日は自分についてお話しします (kyou wa jibun ni tsuite ohanashi shimasu) in Japanese. This is quite formal, and would be used at the start of a speech.
"I want sex", if translated literally into Japanese, would be 私はセックスがほしいです (watashi wa sekkusu ga hoshii desu). However, this is entirely wrong. Even in English the sentence "I want sex" is a bit strange if you think about it. A more natural translation for this sentence would be セックスをしたい (sekkusu o shitai), which means "I want to have sex".
omoi, nentou, kokoro, seishin, maindo, munesanzunKokorodepends which mind in Japanese heart and mind are the sameKokoroi changed my mind = Watashi wa jibun no kangae o kae ta
Jibun (Ji-bun)
jibun de itte
Jibun jishin o shitte
'Jibun de,' 'hitori de.'
Uchi naru jibun
Watashi/jibun/ore wa Daijobu (desu)
Watashi WA jibun no chūshoku o tsukutte imasu
'Watashi jibun kara anata wo mamoremsasen'.
'Watashi jibun kara anata wo mamoremsasen'.
Generally translated, this could be taken to mean: "All answers [can be found/are] inside of you."
You may say 'jibun ga suki,' written: 自分が好き